Electric motor operated kitchen appliance as well as stirring vessel and stirrer therefor
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Solution Overview
Problem
Existing electric motor operated kitchen appliances and stirring vessels face compatibility issues between different model generations, leading to the potential use of unsuitable stirrers with older models in newer vessels, which can affect performance and safety.
Innovation Solution
The design incorporates positioning recesses and protrusions with varying radial lengths on the stirring vessel and stirrer, ensuring that older model stirrers cannot be inserted into newer model vessels, while allowing newer model stirrers to fit into older vessels, by using a combination of first and second radial length differences, thereby preventing compatibility mismatches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of positioning recesses and positioning protrusions is increased for safety reasons, then compatibility control between model generations is improved, but the complexity of the stirring vessel and stirrer design increases
Solution Approach 1:
The patent applies asymmetry by providing positioning recesses with different radial lengths (first radial length and second radial length that is smaller) at different angular positions. This creates an asymmetric positioning pattern that enables model-specific compatibility control. The asymmetric design allows the stirring vessel to distinguish between different stirrer types based on the radial length of positioning protrusions, thereby preventing incompatible model generations from being mixed while maintaining a relatively simple overall structure.
2Reliability
If different numbers of positioning recesses are provided for different model series, then safety and prevention of component mix-up is improved, but the adaptability of the stirring vessel to multiple models is reduced
Solution Approach 1:
The patent applies local quality by providing positioning recesses with different local properties (different radial lengths) at specific angular positions around the bottom opening. The first positioning recesses have a first radial length while the second positioning recesses have a smaller second radial length. This localized differentiation allows the stirring vessel to maintain a unified overall structure while implementing model-specific compatibility control at specific locations, enabling both reliability and adaptability.
3Manufacturing precision
If positioning protrusions with varying radial lengths are designed on the stirrer, then precise fitting and rotational play prevention is improved, but the manufacturing complexity increases
Solution Approach 1:
The stirrer implements asymmetry by providing positioning protrusions with different radial lengths (first positioning protrusions with first radial length and second positioning protrusions with smaller second radial length). This asymmetric design enables precise fitting into the corresponding positioning recesses of the stirring vessel, preventing rotational play and ensuring accurate positioning. The varying radial lengths create a unique geometric signature that must match between compatible stirrer and vessel pairs.
Data Source
AI summary
A stirrer for inserting into a bottom opening of a vessel bottom of a stirring vessel of an electric motor operated kitchen appliance has a plurality of positioning protrusions embodied on its circumferential surface one behind the other in the circumferential direction. A plurality of first positioning protrusions of the circumferential surface protrude with a first radial length difference beyond a smallest radius of the circumferential surface. At least one second positioning protrusion protrudes with a second radial length difference beyond the smallest radius of the circumferential surface, which second radial length difference is smaller than the first radial length difference.