Door unit for closing an opening in a laundry device
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Solution Overview
Problem
Existing door units for laundry care appliances require significant material and complex assembly, with potential gaps in design that may compromise user safety and aesthetics.
Innovation Solution
A door unit design featuring semi-circular ring members with deformable spacer elements and snap/clip connections for easy assembly and enhanced rigidity, reducing material usage while ensuring secure fastening and safety features like a viewing window for user protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional door units with multiple components (rear frame, design spacer, viewing window, front frame) are used, then user safety is ensured through protective spacing, but material costs increase and assembly complexity increases
Solution Approach 1:
The patent combines the rear frame element and design spacer into a single integrated window ring unit. The window ring unit incorporates both the structural frame function and the protective spacing function that were previously separate components, thereby reducing assembly complexity while maintaining safety
Solution Approach 2:
The window ring unit serves multiple functions simultaneously: it provides structural support as a frame, creates protective spacing between the door glass and viewing window, and integrates connection elements for assembly. This multi-functionality reduces the total number of components needed
2Strength
If traditional door units with multiple components and fastening means are used, then secure fastening is achieved, but material costs increase and manufacturing complexity increases
Solution Approach 1:
The connection elements are integrated directly into the window ring unit structure rather than being separate fastening components. This merging reduces the total material quantity while maintaining fastening security through the unified structural design
Solution Approach 2:
The window ring unit employs a streamlined structural design that achieves strength through optimized geometry rather than excessive material thickness, reducing overall material consumption while maintaining fastening capability
3Reliability
If traditional door units with design spacers and multiple elements are used, then protective spacing is ensured, but material costs increase
Solution Approach 1:
The protective spacing function previously provided by a separate design spacer is now integrated into the window ring unit structure itself. This eliminates the need for additional spacer materials while maintaining the required protective distance between door glass and viewing window
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 material costs, simplifies assembly, and enhances the structural integrity of the door unit while providing a safer and more visually appealing design by eliminating the need for additional fastening means and hiding connecting elements for user safety.
Implementation Method 1
each have at least one deformable spacer element for tolerance-free receiving of the window element
Data Source
Figure 1
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Figure 3a
AI summary
The present invention relates to a door unit (13) for closing an opening (11) of a laundry appliance (1), wherein the door unit (13) comprises a first window ring unit (15) in which a window element (23) can be received. The door unit (13) further comprises a second window ring unit (45), wherein the second window ring unit (45) is attachable to the first window ring unit (15) and is provided essentially for design reasons, and a window frame (51) for essentially cladding the door unit (13), wherein the first window ring unit (15) is formed from a substantially first semicircular ring element (19) and a substantially second semicircular ring element (21).