Door assembly of an appliance having one or more assembly aids
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Solution Overview
Problem
The assembly of oven appliance doors is challenging due to variations in alignment and ergonomic concerns when using screws alone for securing the hinges, requiring additional support or fixtures, which not all structures can accommodate.
Innovation Solution
A door assembly with a hinge assembly that includes a hinge body with integral locating and retaining features, which are secured between outer and inner panels using aligned apertures, allowing for precise positioning and retention without additional fixturing, and fasteners to secure the panels together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If only screws are used to secure the hinge assembly, then the assembly process requires additional support fixtures or manual holding, but this increases device complexity and creates ergonomic concerns
Solution Approach 1:
The patent introduces locating features (protrusions and recesses) as intermediary elements between the hinge assembly and door panels. These features act as mediators that automatically align and position components during assembly, eliminating the need for external fixtures or manual holding while maintaining ease of assembly
Solution Approach 2:
The hinge assembly incorporates integral locating features that enable self-alignment and self-positioning during assembly. The protrusions on the hinge body automatically engage with corresponding recesses in the door panels, allowing the assembly to guide itself without external assistance, thereby reducing device complexity and improving ease of manufacture
2Manufacturing precision
If only screws are used to secure the hinge assembly, then the design remains simple, but manufacturing precision and alignment control deteriorate
Solution Approach 1:
The locating features serve as intermediary alignment mechanisms that bridge the hinge assembly and door panels. The protrusions and recesses create precise geometric relationships between components, ensuring consistent alignment and positioning without requiring complex external jigs or fixtures
Solution Approach 2:
The patent replaces the need for external mechanical alignment fixtures with integral locating features built into the hinge assembly itself. This substitution maintains manufacturing precision by embedding alignment functionality directly into the components, thereby avoiding the complexity of external alignment systems
3Ease of operation
If a cavity-mounted hinge is used, then the hinge can be supported by the cavity structure, but not all structures can support this style of hinge
Solution Approach 1:
The hinge assembly design with integral locating features provides universal applicability across different door panel structures. The self-contained locating and retaining features enable the hinge to be properly positioned and secured on various structural configurations without requiring specific cavity formations, thereby improving both ergonomics and structural compatibility
Data Source
AI summary
A door assembly for an appliance includes an outer panel, at least one inner panel arranged adjacent to the outer panel, and a hinge assembly for rotatably securing the door assembly to the appliance. The inner panel(s) includes a first set of apertures. The first set of apertures includes a first aperture and a second aperture. The hinge assembly is secured between the outer and inner panels. The hinge assembly includes a hinge body and a hinge extending from the hinge body. The hinge body defines at least one locating feature and at least one retaining feature formed integrally therewith. The locating feature(s) is received within the first aperture so as to position the inner panel in a desired configuration. The retaining feature(s) is received within the second aperture so as to retain the inner panel in the desired configuration. Further, the door assembly includes one or more fasteners securing the outer panel, the inner panel, and the hinge body together.