Rotary Laundry UI Assembly With Axial Constraint Against Jamming

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing laundry treatment appliances, such as washing machines and dryers, often experience misalignment and blockage issues with rotary user interface elements, leading to inaccurate operation and potential damage, affecting user experience and appliance quality perception.

Innovation Solution

A rotary user interface assembly with axially constrained rotary elements by fixed components, utilizing a rotary encoder and display within a robust housing, prevents jamming and ensures precise handling without additional parts, using a coaxial arrangement and optical transducers for reliable operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional rotary user interface elements are used in laundry treatment appliances, then the appliance can provide basic program selection functionality, but misalignment and blockage issues occur leading to inaccurate operation and potential damage

Engineering Contradiction:

Improveoperation reliabilityVSAvoidrotation accuracy

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The rotary user interface element is divided into separate functional components: a rotary knob for user interaction, a rotary encoder for detecting rotation, and a display for showing information. This segmentation allows each component to be optimized independently and reduces misalignment issues between parts.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent replaces traditional mechanical rotary switches with a rotary encoder that uses optical transducers to detect rotation. This substitution of mechanical systems with optical/electronic systems eliminates wear and misalignment problems while maintaining rotational detection accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If additional parts and complex assembly structures are used to prevent misalignment, then component protection is improved, but manufacturing cost and complexity increase

Engineering Contradiction:

Improvecomponent protectionVSAvoidmanufacturing simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent combines multiple functions into integrated components. The rotary encoder assembly includes the encoder body, optical transducers, and display elements all mounted together on a single PCB board. This merging reduces the number of separate parts and simplifies assembly while maintaining protection against misalignment.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The rotary encoder assembly serves multiple functions simultaneously: it detects rotational position, provides visual feedback through the display, and integrates all components on a single PCB for simplified manufacturing. This multi-functionality reduces the need for additional protective parts.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If a robust and precise rotary interface is provided to enhance user experience, then user feedback quality improves, but device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improveuser feedback qualityVSAvoidassembly complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent uses optical transducers in the rotary encoder to detect rotation instead of complex mechanical linkages. This provides precise rotational detection for smooth user feedback while reducing mechanical complexity. The optical system eliminates wear and provides accurate position detection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The display provides a visual copy or representation of the selected program and parameters, giving users feedback without requiring complex mechanical indicators. This optical/electronic feedback mechanism enhances user experience while keeping the mechanical structure simple.

Inventive Principle:

Principle #26Copying

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 provides a reliable, robust, and easy-to-manufacture user interface that prevents blockages and ensures a consistent user experience, enhancing the perceived quality of the appliance by allowing precise handling and long-term functionality.

Implementation Method 1

utilizing a rotary encoder and display within a robust housing, prevents jamming and ensures precise handling without additional parts, using a coaxial arrangement and optical transducers for reliable operation

Methodology Applied

Scientific EffectOptical transduction: Photoelectric Effect

Data Source

PatentEP3168357B1Laundry treatment appliance

Publication Date: 2020.01.22 ELECTROLUX APPLIANCES

Figure 1
Figure 2
Figure 3

AI summary

Laundry treatment appliance (2), comprising a user interface (62), said user interface (62) comprising an assembly (66), said assembly (66) comprising at least one fixed element (68, 72, 80), at least one rotary element (76, 88), and a display (68), whereby at least one said rotary element (76, 88) is a built as user interface element (44), whereby said display (68) is arranged inside said user interface element (44), whereby said at least one said rotary element (76, 88) is axially constrained by at least one said fixed element (68, 72, 80).