Self-locking multi-size cartridge extraction unit
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Solution Overview
Problem
Existing beverage preparation machines face challenges in efficiently and cost-effectively positioning and sealing cartridges of different sizes, leading to potential damage and complex mechanical designs that are not suitable for low-cost consumer market devices.
Innovation Solution
A modular extraction unit with movable parts that adjust to accommodate cartridges of two different heights, featuring a mechanical sensor to lock and unlock the seating mechanism based on cartridge height, ensuring proper positioning and sealing without requiring complex mechanical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanical sensor and lock mechanism are added to accommodate different cartridge heights, then adaptability is improved, but device complexity increases
Solution Approach 1:
The cartridge itself serves as the sensing element through its height, automatically triggering the appropriate cavity configuration without requiring external sensors or complex detection mechanisms. The system self-adjusts based on the physical dimension of the inserted cartridge.
Solution Approach 2:
The patent uses simple, inexpensive mechanical elements like springs and barrier members that can be easily replaced if needed, rather than complex electronic sensors or precision mechanisms. The solution favors simple, robust components over sophisticated but fragile systems.
2Manufacturing precision
If the first and second portions are locked for both cavity depths, then positioning precision is improved, but ease of operation deteriorates
Solution Approach 1:
The lock mechanism is made dynamic rather than static - it automatically engages or disengages based on the cartridge height and cavity configuration. The spring-loaded barrier member moves freely to allow loading, then locks automatically when the cartridge is in position, providing both ease of operation and precise positioning.
Solution Approach 2:
The system provides mechanical feedback through the barrier member that responds to the cartridge height. When a cartridge is inserted, its height determines whether the barrier member engages the lock, creating an automatic feedback mechanism that ensures correct positioning without user intervention.
3Adaptability or versatility
If a modular extraction unit with movable parts is used, then adaptability is improved, but device complexity increases
Solution Approach 1:
The extraction unit is divided into separable portions (first and second portions) that can move relative to each other to create different cavity depths. This segmentation allows the same basic structure to accommodate different cartridge heights by simply changing the relative position of the portions.
Solution Approach 2:
The movable portion serves multiple functions: it creates the sealing surface for extraction, adjusts the cavity depth to match cartridge height, and works with the lock mechanism to secure the cartridge. One component performs multiple roles, reducing the need for separate specialized parts.
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
An extraction unit (10) for extracting cartridges (1a; 1b) of two different heights (ha;hb) comprises a seat (11, 12, 13; 15) for receiving any of such cartridges (1a; 1b) for extraction thereof in the seat. The seat is delimited by a first part (11,12,13) and second part (15) that are relatively movable between a cartridge extraction position and a cartridge loading and/or ejection position. The first part (11,12,13) has a first portion (11,12) and a second portion (13) that are relatively movable to delimit a cavity (12') having selectively: - a first depth (da) for receiving a cartridge (la) of the first height (ha); and - a second depth (db) for receiving a cartridge (1b) of the second height (hb), the first part (11,12,13) has a lock (112', 132, 132', 142' ) for locking the first and second portions (11,12,13) when the delimited cavity (12') has the first depth (da) or the second depth (db). Such extraction unit (10) further comprises a mechanical sensor (14) that senses the height (ha;hb) of a cartridge (la; lb) and that controls the lock (112', 132, 132', 142' ) to lock or unlock the first and second portions (11,12,13) when the sensor is actuated by a cartridge of first height (ha) or of second height (hb).