Adjustable Door Hinge System for Appliance Gap Alignment
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Solution Overview
Problem
Existing household appliance door assembly processes face challenges in achieving proper alignment and gap adjustment due to component and assembly variations, leading to potential misalignment and aesthetic issues.
Innovation Solution
An adjustable hinge system comprising a first hinge with a base portion and a door receiving portion, and a second hinge with a mounting block and door plate, allowing for fore and aft, as well as side-to-side movement to compensate for gaps and ensure a precise fit and finish, utilizing elongated slots and a tongue-and-channel mechanism for smooth adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed hinge system is used to secure the door, then the door can be firmly attached to the housing unit, but alignment gaps and misalignment occur due to component and assembly variation
Solution Approach 1:
The hinge system transitions from a fixed configuration to a dynamic, adjustable configuration. The mounting block is made movable within the frame channel, and the door plate is made movable relative to the mounting block via the tongue-and-channel mechanism. This allows the door position to be adjusted in multiple directions (fore-aft and side-to-side) to compensate for manufacturing variations and achieve proper alignment.
Solution Approach 2:
The hinge system is divided into separate functional components: a first hinge with base portion and door receiving portion, a second hinge with mounting block and door plate, a movable mounting block within a frame channel, and a tongue-and-channel mechanism. This segmentation allows independent adjustment of each component to achieve the desired door alignment.
2Manufacturing precision
If adjustment mechanisms are added to eliminate gaps, then door alignment improves, but device complexity increases
Solution Approach 1:
Multiple adjustment functions (fore-aft adjustment via first hinge elongated slots, side-to-side adjustment via mounting block movement in frame channel, and fine-tuning via second hinge elongated slots) are merged into a single integrated hinge assembly. The tongue-and-channel mechanism combines the mounting block and door plate into one movable unit, reducing the number of separate adjustment mechanisms needed.
Solution Approach 2:
The hinge assembly serves multiple functions: it provides the primary hinge connection, enables fore-aft adjustment through elongated slots, enables side-to-side adjustment through the movable mounting block in the frame channel, and provides fine-tuning capability. This multi-functionality reduces the need for separate adjustment mechanisms.
Data Source
AI summary
A hinge assembly for a door of a household appliance has a first hinge and a second hinge. The first hinge includes a base portion and a door receiving portion. The base portion includes at least one elongated slot to receive a fastener. The elongated slot enables positioning of the door receiving portion. The second hinge includes a mounting block and a door plate. The door plate has a door receiving portion that has at least one elongated slot to enable positioning of the door receiving portion. The door plate is secured via at least one fastener to the mounting block. The mounting block is movable in a direction substantially perpendicular to the door plate for positioning the door.