Door assembly for a laundry treating appliance
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Solution Overview
Problem
Existing laundry treating appliances face challenges in ensuring the durability and efficient assembly of door assemblies, particularly in protecting user interfaces from liquid ingress and improving user interface usability and sound transmission while maintaining a sturdy and ergonomic design.
Innovation Solution
The door assembly incorporates a multi-component structure with features like a transparent viewing window, user interface, and sound openings, utilizing specialized fasteners, hooks, and heat staking for secure assembly, along with liquid diversion channels and gaskets to protect electronics, and a flat, angled user interface design for improved ergonomics and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple door pieces are used to support various parts of the door assembly, then the door assembly can accommodate user interface and viewing window, but the assembly complexity increases
Solution Approach 1:
The door assembly is divided into multiple door pieces including a front door piece, rear door piece, and intermediate door piece. Each door piece serves specific functions: the front door piece supports the viewing window, the intermediate door piece supports the user interface, and the rear door piece provides structural support. This segmentation allows the door assembly to accommodate various components while maintaining organizational clarity and functional efficiency.
2Reliability
If heat staking is used to secure components, then the assembly durability is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent replaces traditional mechanical fastening methods (such as screws or clips) with heat staking. Heat staking involves using heat to deform a stake and mechanically interlock components together, providing a durable and permanent connection. This substitution eliminates the need for additional fasteners and reduces assembly steps, despite requiring specialized heating equipment.
3Reliability
If liquid diversion channels and gaskets are added to protect user interface, then the reliability against liquid ingress is improved, but the device complexity increases
Solution Approach 1:
The patent introduces liquid diversion channels and gaskets as intermediary elements between the user interface and the external environment. These components act as barriers that redirect liquid away from the user interface electronics and provide sealing to prevent liquid ingress. The gaskets create waterproof seals around the user interface area, while the diversion channels guide liquid flow away from sensitive components.
4Ease of operation
If sound openings are incorporated, then sound transmission is improved, but the protection against liquid ingress becomes more difficult
Solution Approach 1:
The patent uses flexible membranes or thin film structures for sound openings. These flexible shells allow sound waves to pass through while maintaining a barrier against liquid ingress. The flexible nature of these membranes enables acoustic transmission while their continuous structure prevents liquid penetration, effectively resolving the contradiction between sound transmission and liquid protection.
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 enhances the durability and usability of the door assembly, ensuring effective protection of user interfaces from liquids, improved sound transmission, and ergonomic design, while allowing flexibility for various laundry treating appliances.
Implementation Method 1
a heat stake connection comprising a plurality of posts on one of the intermediate door or the trim element and a plurality of receiving openings on the other of the intermediate door or the trim element, the posts configured to be received within the receiving openings and thermally deformed to create a plurality of caps to secure the trim element to the intermediate door
Data Source
AI summary
A door assembly has an intermediate door, a door cover and a rear door. The intermediate door has a front surface and a rear surface and defining an opening, the intermediate door having a cover hook opening. The door cover is adjacent the front surface. The door cover has a door hook engaging the cover hook opening.