Multi-Position Actuating Knob Assembly for Universal Appliance Control
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Solution Overview
Problem
Existing domestic appliance operating arrangements for gas stoves require multiple operating knobs for different models, leading to increased production costs and reduced versatility.
Innovation Solution
A domestic appliance operating arrangement featuring an actuating knob with multiple receiving sections and a U-shaped fastening device that can be securely fastened to the actuating shaft in various axially offset positions, allowing for a single knob to be used across various appliances with a secure and damage-free installation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple operating knobs are provided for different models, then the distance between the operating knob and cover plate can be adjusted for different appliance models, but the production cost increases and versatility decreases
Solution Approach 1:
The operating knob is designed with multiple receiving sections (at least two) positioned at different axial locations, allowing a single universal knob design to accommodate multiple appliance models. The fastening device can engage with different receiving sections to achieve various distances between the operating knob and cover plate, eliminating the need for model-specific knobs and reducing production costs.
2Reliability
If the operating knob is firmly attached to the actuating shaft, then the connection is secure, but the installation process may cause damage to the gas valve
Solution Approach 1:
The fastening device incorporates a resilient element that provides dynamic, controlled engagement. During installation, the resilient element allows gradual deformation and engagement, reducing impact forces. The engagement force can be controlled by the geometry of the annular groove and fastening device, ensuring secure attachment without exceeding damage thresholds during installation.
Solution Approach 2:
The resilient element in the fastening device acts as a cushioning mechanism that absorbs and distributes engagement forces. This pre-designed cushioning prevents sudden impact forces during installation that could damage the gas valve, while still achieving reliable secure attachment once installed.
3Adaptability or versatility
If the operating knob can be easily removed and repositioned, then versatility is improved, but the connection security may be compromised
Solution Approach 1:
The operating knob is segmented into multiple receiving sections, each capable of independently receiving the fastening device. This segmentation allows the knob to be repositioned by simply moving the fastening device between different receiving sections, maintaining connection security through the same fastening mechanism while enabling versatile repositioning.
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 enables a single actuating knob to be used in multiple positions, reducing production costs and enhancing versatility while ensuring secure attachment and damage-free assembly, allowing for a wide range of applications across different household appliances.
Implementation Method 1
The fastening device preferably has a U-shape. The fastening device can be made of spring steel wire.
Data Source
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AI summary
The invention relates to a domestic appliance operating arrangement (9) with an operating shaft (8), an operating knob (10) arranged on the operating shaft (8) in a rotationally fixed manner, and a fastening device (13) which is designed to fasten the operating knob (10) to the operating shaft (8), wherein the actuating knob (10) has at least two receiving sections (15 - 17) for receiving the fastening device (13) and wherein the at least two receiving sections (15 - 17) are positioned in such a way that the actuating knob (10) at least two different axially offset positions on the actuating shaft (8) can be fastened.