Multi-Compartment Coffee Mill Hopper With Ratcheted Selector Locking
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Solution Overview
Problem
The existing coffee mill hopper design lacks feedback for selecting suitable rotational positions of the control knob, leading to potential congestion or weak coffee, and the positions are not fixed, risking accidental changes due to grinder vibrations.
Innovation Solution
A coffee mill hopper assembly with a compartment selector featuring a shaft and closure member, including toothed members that provide tactile feedback and are spring-biased to lock into suitable positions, preventing unsuitable selections and ensuring stability against vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the control knob allows unlimited rotational positions, then the user has flexible control over outflow opening size, but the risk of selecting unsuitable positions (causing congestion or weak coffee) increases and no feedback is provided to confirm suitable selections
Solution Approach 1:
The patent implements a ratchet mechanism with discrete engagement positions that provide tactile feedback to the user. As the control knob rotates, the ratchet engages at specific predetermined positions, creating audible and tactile clicks that confirm suitable selections. This feedback mechanism guides the user to appropriate outflow opening sizes while preventing selection of unsuitable positions that would cause congestion or weak coffee.
Solution Approach 2:
The continuous rotational range of the control knob is segmented into discrete predetermined positions through the ratchet mechanism. Instead of allowing unlimited continuous rotation, the mechanism divides the rotation into specific angular positions where the ratchet teeth engage with the corresponding slots in the control knob, providing both flexibility and reliability.
2Ease of operation
If the control knob can rotate freely without fixation, then adjustment is easy, but the rotational position may inadvertently change under the vibrating action of the grinder
Solution Approach 1:
The ratchet mechanism is designed to automatically lock the control knob into predetermined positions during the adjustment process. As the user rotates the knob, the ratchet teeth engage with the slots at specific positions, automatically securing the selected position without requiring additional fixation actions from the user. This preliminary locking action prevents inadvertent changes during grinder operation.
Solution Approach 2:
The ratchet mechanism acts as an intermediary between the control knob and the closure member. It provides a mechanical interface that allows easy rotation during adjustment while simultaneously preventing backward movement or inadvertent position changes through its one-way engagement mechanism, thus mediating between ease of operation and positional stability.
3Quantity of substance
If the outflow opening is made small to control coffee flow, then coffee strength increases, but congestion is likely to occur
Solution Approach 1:
The ratchet mechanism provides tactile feedback that guides the user to select from predetermined outflow opening sizes that have been optimized to avoid congestion. The discrete engagement positions correspond to opening sizes that maintain adequate flow rates while preventing harmful congestion effects, thus using feedback to eliminate the need to trade off between flow rate and congestion risk.
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 discrete, locked rotational positions for the closure member, eliminating unsuitable selections and offering tactile feedback, ensuring consistent coffee strength and preventing accidental changes during operation.
Implementation Method 1
At least one of the toothed members may be movably arranged and be spring-biased to force the teeth of the toothed members towards each other in a meshing relationship
Data Source
Figure 1~3
Figure 4~5
Figure 6A~6D
AI summary
Coffee mill hopper assembly (1), comprising a hopper (10) with multiple compartments (18a, 18b) for storing coffee beans and at least one outlet (22) through which coffee beans may be released from the respective compartments, and a compartment selector (30) comprising a rotatable control knob for adjusting the position of a closure member (36) that cooperates with the at least one outlet (22) to provide for at least one outflow aperture that, depending on the rotational position of the closure member, selectively enables a release of coffee beans. The compartment selector (30) further comprises two toothed members that are rotationally locked to the control knob (34) and the hopper (10), respectively, wherein at least one of said toothed members (50a, 50b) is movably arranged and spring-biased to force the teeth (54a, 54b) of the toothed members towards each other in a meshing relationship.