Magnetically Held Movable Control Element with Segmented Illumination
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Solution Overview
Problem
Existing operating devices for electrical appliances, such as hobs, face challenges in providing an illuminated display on a movable operating element that is both easy to implement and robust, while maintaining a practical design.
Innovation Solution
An operating device with a flat, transparent control panel illuminated from below by lighting means, featuring a magnetically held movable control element with counter-magnets and sensor means for position detection, allowing for rotation or sliding movements without the need for active components, ensuring durability and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a movable control element is illuminated from below through a transparent control panel, then the display visibility is improved, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The control element is divided into a stationary control panel and a movable operating element. The operating element is segmented into a top part with display features and a bottom part with magnetic holding components, allowing independent illumination of the display area without complicating the overall structure.
Solution Approach 2:
A transparent control panel serves as an intermediary between the light source below and the display above. This mediator allows light to pass through while maintaining structural integrity and simplifying the illumination system design.
2Ease of operation
If a magnetic holding system is used to enable movable control elements, then operational flexibility is improved, but the risk of unintended movement or detachment increases
Solution Approach 1:
Counter-magnets are positioned on the operating element to create opposing magnetic forces that balance and stabilize the control element during movement. This counter-magnetic system prevents unintended movement while allowing controlled operation.
Solution Approach 2:
The magnetic holding system is designed to be dynamic rather than static - the magnetic force automatically adjusts during movement, providing strong holding force at rest and allowing smooth movement when actuated, ensuring both stability and operational flexibility.
3Measurement precision
If sensor means are integrated into the control panel to detect position, then measurement precision is improved, but the device complexity increases
Solution Approach 1:
The control panel is designed as a multi-functional component that combines structural support, illumination transmission, and sensor integration. This universal design allows position detection without adding separate complex sensor systems.
Solution Approach 2:
Magnetic sensor means are used to replace complex mechanical position detection systems. The magnetic field-based sensing provides precise position detection while eliminating the need for mechanical linkages, reducing overall device 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
The solution provides a clear, recognizable illuminated display that is durable and easy to manufacture, with the magnetic holding system ensuring stability and the sensor means enabling precise movement detection, enhancing operational efficiency and user experience.
Implementation Method 1
at least one holding magnet below the control panel, with which a movable control element, which is arranged on the front side of the control panel relative to the light source and relative to the at least one holding magnet, is held magnetically
Implementation Method 2
lighting means below the control panel to illuminate the control panel from below to create an illuminated display that is visible from above
Data Source
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AI summary
An operating device for an electrical appliance comprises a closed, translucent control panel, a light source below the control panel for illumination, several retaining magnets below the control panel, and a movable control element that is magnetically attached to the front of the control panel, allowing it to move relative to the light source and the retaining magnets. Several counter-magnets are provided within the control element to interact with the retaining magnets, guiding the control element to the control panel during operation and holding it in place. Sensors below the control panel detect the rotational position of the control element. The control element is translucent in one direction, from the light source to the control element, and has several translucent areas that are separated from each other without any transmission between them.