Appliance Door Viewing Window Assembly With Integrated Opaque Cover
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Solution Overview
Problem
Existing household appliance doors with viewing windows are costly to manufacture and assemble due to complex shapes and precise positioning requirements, leading to high manufacturing and assembly costs.
Innovation Solution
A door design featuring two one-piece door parts made from different materials, with a transparent viewing window area and an opaque edge or cover, produced using a two-stage injection molding process, eliminating the need for spacers and allowing for simpler, more precise manufacturing and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the viewing window and edge are produced separately and connected using rings, then the door can be assembled with modular components, but the manufacturing costs and assembly costs increase due to complex positioning and fixing requirements
Solution Approach 1:
The patent combines the viewing window and the edge into a single integrated door part produced by injection molding. This eliminates the need for separate rings and multiple components, reducing both manufacturing complexity and assembly complexity while maintaining the functional separation between transparent and opaque areas.
Solution Approach 2:
The door is divided into two main parts (first door part with viewing window and second door part with cover) that are produced separately but designed to simplify assembly. The segmentation allows for specialized manufacturing of each part while reducing the overall assembly complexity compared to traditional multi-component designs.
2Manufacturing precision
If the viewing window is precisely positioned and secured using rings, then the structural integrity is maintained, but the assembly time and positioning precision requirements increase
Solution Approach 1:
By integrating the viewing window directly into the door part structure through injection molding, the patent eliminates the need for separate positioning rings and fixing mechanisms. This ensures precise positioning is achieved during the molding process itself, significantly reducing assembly time while maintaining high positioning precision.
3Adaptability or versatility
If the door uses a traditional fixed division into viewing window and double ring holder, then the structure is simple, but the design versatility is limited
Solution Approach 1:
The patent employs flexible design elements in the cover and door parts that allow for varied configurations and designs. The cover can be designed with different patterns, cutouts, and shapes while maintaining the basic structural integrity, enabling design versatility without significantly increasing structural complexity.
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 design reduces manufacturing effort, achieves high precision, and enhances insulation by eliminating gaps, while also eliminating the need for privacy screen printing or lamination, resulting in a cost-effective and variably designed door.
Implementation Method 1
The first door part and the second door part are each produced in one piece from at least two different material components
Data Source
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AI summary
The invention relates to a door 1 for a household appliance W, in particular a laundry treatment device W, comprising at least: an at least two-component first door part 2 comprising a transparent first viewing window region 6 and an opaque boundary region 7 laterally surrounding the first viewing window region 6 and an at least two-component second door part 3 comprising a transparent second viewing window region 8 and an opaque cover 9 partially covering the second viewing window region 8. The method according to the invention comprises at least the following steps of: producing an at least two-component first door part 2 from plastic having a transparent first viewing window region 6 and an opaque boundary region 7 laterally surrounding the first viewing window region 6 by means of a two-stage injection molding method; producing an at least two-component second door part 3 from plastic having a transparent second viewing window region 8 and an opaque cover 9 partially covering the second viewing window region 8 by means of a two-stage injection molding method; and permanent connecting of the first door part 2 and the second door part 3 so that a cut-out section of the cover substantially exposes the first viewing window region 6.