Coffee Grinder Magnetic Sensor for Precise Grinding Degree Control
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Solution Overview
Problem
Existing coffee grinders suffer from imprecise and unreliable grinding degree settings due to mechanical play and systematic deviations, which affect the quality of brewed coffee.
Innovation Solution
A coffee grinder with a magnetic rotation position sensor that adjusts the distance between grinding elements, allowing for precise control of the grinding degree, using an adjusting element and a motor-driven shaft supported by a bearing element, with a magnetic sensor providing accurate rotational position measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual adjustment using handwheel or adjusting ring is used, then device complexity is reduced, but manufacturing precision deteriorates due to mechanical play and systematic deviations
Solution Approach 1:
The patent replaces the purely mechanical handwheel adjustment system with a magnetic field-based measurement system. A magnetic sensor detects the position of a magnet attached to the adjusting element, converting mechanical position into electrical signals for precise measurement and display, thereby eliminating mechanical play while maintaining simple manual adjustment operation.
Solution Approach 2:
The patent implements a feedback system where the magnetic sensor continuously monitors the adjusting element's position and displays it on an indicator. This provides real-time feedback to the user about the actual grinding degree setting, allowing for precise control and verification of the adjustment, eliminating systematic deviations through accurate position information.
2Ease of operation
If mechanical adjustment mechanism is used, then ease of operation is improved, but reliability deteriorates over time due to mechanical play
Solution Approach 1:
The patent substitutes mechanical position detection with a magnetic field-based sensor system. The magnetic sensor detects the magnet's position without physical contact, eliminating wear and mechanical play that compromise reliability over time, while the adjusting element itself remains mechanically simple for easy operation.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the adjusting element and the detection system. The magnet attached to the adjusting element creates a magnetic field that the magnetic sensor detects, providing reliable position information without mechanical contact or wear, thus maintaining reliability over time while preserving ease of mechanical adjustment.
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 stable and accurate method for adjusting the grinding degree, ensuring consistent coffee quality by minimizing mechanical play and systematic deviations, and offering user feedback for precise settings.
Implementation Method 1
a magnetic rotation position sensor is provided, which determines the absolute rotation position of this adjusting element as a measure of the distance unambiguously directly or indirectly
Data Source
AI summary
Coffee grinder for grinding coffee beans, comprising a container or supply element for coffee beans and a grinding device for grinding the coffee beans. The grinding device comprises a first and a second grinding element between which the coffee beans are ground, the distance between the two grinding elements in the grinding process determining the degree of grinding of the ground coffee, and at least one grinding element being driven by a motor. An adjusting element is provided, with which the distance between the two grinding elements can be adjusted by rotating an adjusting element, and a magnetic rotational position sensor, which directly or indirectly determines the absolute rotational position of this adjusting element as a measure of the distance and provides it for the further control of the coffee grinder.