Mixer for Multi-Component Cartridges with Keyed Two-Stage Coupling
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Solution Overview
Problem
Existing mixers for multi-component cartridges face issues with secure and reliable connections, leading to potential leakage, damage, and improper mixing when connected to incorrect cartridges.
Innovation Solution
A mixer design featuring an axial latching movement followed by a rotational tightening mechanism, combined with keying elements to ensure compatibility with the correct cartridge, and a retaining ring with elastic latching arms for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the mixer is designed with a simple connection interface for easy coupling with multi-component cartridges, then the ease of operation is improved, but the reliability of the connection deteriorates, leading to potential leakage and improper connection
Solution Approach 1:
The connection interface is divided into two distinct phases: an axial latching movement for initial coupling and a rotational tightening movement for secure connection. This segmentation allows the first phase to provide ease of operation while the second phase ensures reliability, resolving the contradiction between easy coupling and secure connection.
Solution Approach 2:
The axial latching movement serves as a preliminary action that establishes initial contact and alignment between the mixer and cartridge before the rotational tightening movement. This preliminary coupling guides the user through the connection process while setting up the structure for the final secure connection, balancing ease of operation with connection reliability.
2Reliability
If the mixer is designed with compatibility features to prevent connection to wrong cartridges, then the reliability is improved, but the device complexity increases due to additional keying means
Solution Approach 1:
The keying means incorporate asymmetric geometric features that only align with corresponding asymmetric features on compatible cartridges. This asymmetry provides inherent compatibility control without requiring complex electronic or mechanical locking systems, achieving reliability through simple geometric interlocking.
Solution Approach 2:
The keying means act as an intermediary element between the mixer and cartridge, mediating the compatibility check. The keying protrusions and corresponding recesses provide a simple mechanical verification that prevents connection to incompatible cartridges without adding complex control systems.
3Reliability
If the connection process requires a two-step movement (axial latching followed by rotational tightening), then the reliability is improved, but the ease of operation deteriorates due to the more complex connection process
Solution Approach 1:
The connection process utilizes dynamic movements where the axial latching movement establishes initial contact and the rotational tightening movement secures the connection. The elastic deformation of latching arms during these movements provides tactile feedback and guides the user through the two-step process, making the enhanced reliability achievable while maintaining operational simplicity.
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
Ensures a tight, reliable connection that prevents damage and improper mixing by ensuring the mixer is connected only to the intended cartridge, allowing for versatile use across different configurations.
Implementation Method 1
The latching arms (17a, 17b) are formed of an elastic material and extending radially inward with respect to the longitudinal center axis of the mixer
Data Source
AI summary
A mixer includes a mixer housing, a mixing configuration arranged at least partly within the mixer housing and defining first and second inlet openings arranged at a first end of the mixing configuration and a dispensing opening arranged at a second end axially opposite the first end of the mixing configuration forming a mixing flow path, a connection device to connect the mixer to the multi-component cartridge by an axial latching movement followed by a substantially rotational tightening movement, and a keying element to block the axial latching movement when the multi-component cartridge is not provided with a matching keying configuration.