Brewing Module Cam Mechanism for Variable Transmission Ratio Closure
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Solution Overview
Problem
Existing brewing modules with manual closure for portion capsules face challenges in providing a consistent and pleasant user experience due to variable force requirements, leading to unpleasant jerking sensations and mechanical resistance issues, which complicates the design with too many parts and complex mechanisms.
Innovation Solution
A brewing module with a cam disk-based transmission mechanism that offers a variable transmission ratio along a guide surface, allowing for a smoother closing and opening movement by adjusting the gear ratio dynamically, ensuring even mechanical resistance and compensating for force variations, and incorporating a damping device for controlled movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed lever and transmission ratio is used in the brewing module, then the mechanism is simple, but the mechanical resistance is not consistent and causes unpleasant jerking sensations
Solution Approach 1:
The patent applies a cam mechanism with a variable transmission ratio that dynamically adjusts during the closing movement. The cam profile is specifically designed to provide different mechanical resistance characteristics at different stages of the brewing chamber closure, ensuring smooth operation without jerking sensations while maintaining reasonable mechanism complexity.
Solution Approach 2:
The transmission ratio is changed as a function of the closing position through the cam mechanism. By varying the geometric parameters of the cam profile, the system achieves consistent mechanical resistance throughout the closing movement, transforming the fixed parameter approach into a variable parameter system that optimizes user experience.
2Force
If the transmission ratio is increased to provide sufficient force for capsule piercing, then high force is available, but the mechanical resistance becomes too large and operation becomes difficult
Solution Approach 1:
The cam mechanism provides a dynamically varying transmission ratio that is low during the initial closing phase (when little force is needed) and increases only when capsule piercing requires high force. This dynamic adjustment ensures sufficient piercing force without making the entire closing operation difficult.
Solution Approach 2:
The closing movement is segmented into different phases with different force requirements. The cam profile is designed to provide appropriate transmission ratios for each phase: low resistance for initial closure, high force for piercing, and moderate resistance for final sealing, optimizing ease of operation across all stages.
3Ease of operation
If a variable transmission ratio mechanism is used to smooth the closing behavior, then the haptic feedback is improved, but the mechanism becomes more complicated with more parts
Solution Approach 1:
The patent implements a variable transmission ratio through a cam mechanism, which is a well-established mechanical element that achieves parameter variation without requiring complex multi-component systems. The cam profile alone provides the necessary dynamic transmission ratio adjustment, maintaining relative simplicity.
Solution Approach 2:
The cam mechanism serves multiple functions simultaneously: it provides the variable transmission ratio for smooth closing behavior, guides the movement of the brewing chamber cover, and ensures proper timing of the closing sequence. This multi-functionality reduces the need for additional separate components.
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 functionally and haptically satisfactory brewing experience with consistent mechanical resistance, preventing jerking sensations and reducing the complexity of mechanics, while maintaining a compact design with fewer parts.
Implementation Method 1
The transmission mechanism has a cam disk which is rotatably mounted on the housing and has a first guide surface, the second brewing module part being displaceable by the first guide surface along a displacement path fixed to the housing from the first brewing module part position to the second brewing module part position
Implementation Method 2
The brewing module is characterized in that the first guide surface defines a transmission ratio that is variable along the first guide surface
Data Source
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AI summary
The invention relates to a brewing module for preparing a brewed beverage from a portion capsule, comprising in addition to a housing (2), a first brewing module part (3) and a second brewing module part (4) that can be moved relative to the housing between a first brewing module part-position and a second brewing module part position, a brewing chamber being formed in the second brewing module part position. The brewing module also comprises a control element which can be manually moved from a first control element position into a second control element position and a transmission mechanism which transmits a movement of said control element into a movement of the second brewing module part (4). The transmission mechanism comprises a cam (30) having a first guide surface and being rotatably mounted on the housing (2), the second brewing module part can be moved by said first guide surface along a displacement section that is secured to the housing, from a first brewing module part position into a second brewing module part position in which the cam is rotated by the control element. The first guide surface (34) defines a variable transmission ratio along the guide surface.