Cartridge Guide Element Asymmetry Prevents Assembly Errors
Solution Overview
Problem
Existing cartridges for multi-component compounds often result in incorrect assembly due to mismatched guide portions and receptacles, leading to contamination and improper mixing ratios when used with ejection devices, as larger receptacles can fit but leave gaps, allowing compound leakage and contamination.
Innovation Solution
Incorporating guide elements adjacent to the guide portions on the head part to prevent incorrect assembly by ensuring a specific matching length, allowing users to visually and tactilely identify incorrect cartridges, preventing them from being inserted into ejection devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a receptacle with a larger cross-section is joined to a guide portion, then the receptacle can be physically connected, but gaps remain at the sides allowing compound leakage and contamination
Solution Approach 1:
The guide element creates an asymmetric geometry where the receptacle and guide portion have non-matching dimensions. Specifically, the guide element protrudes into the receptacle chamber such that only receptacles with specific cross-sectional dimensions can be properly inserted, while larger or smaller receptacles are physically blocked from complete insertion, preventing gaps and ensuring proper sealing.
2Reliability
If guide elements are added to prevent incorrect assembly, then assembly reliability is improved, but device complexity increases
Solution Approach 1:
The guiding function is segmented from the main guide portion and implemented as a separate, distinct guide element. This guide element is positioned adjacent to the guide portion and works in conjunction with it to provide dimensional checking. The segmentation allows the guide element to be a simple, focused component rather than a complex integrated system.
Solution Approach 2:
The guide element performs preliminary verification of receptacle compatibility before the actual joining process. By checking the dimensions of the receptacle cross-section against the guide element's geometry during the insertion attempt, the system prevents incorrect assemblies from completing, thereby ensuring reliability without requiring complex verification mechanisms.
3Adaptability or versatility
If the cross-sectional opening of the receptacle is adapted for varying components, then different component ratios can be ejected, but incorrect receptacles can still be joined to guide portions
Solution Approach 1:
The guide element creates an asymmetric geometric constraint that complements the adapted cross-sectional opening. The guide element's dimensions are specifically designed to match only the correct receptacle configuration, providing a physical key-lock mechanism that ensures only receptacles with the correct component ratio adaptation can be properly joined to the guide portion.
Data Source
AI summary
A cartridge (11) used as a container for a compound that can be ejected by an ejection device, has two receptacles (12, 16) and a head part (21), each receptacle (12, 16) having a receptacle chamber (13, 17) for components of the compound with the head part (21) having a base plate (22) with an outlet opening (23) for the compound and, at a contact surface (24) of the base plate (22), two guide portions (25, 26) for joining to an end (14, 18) of the corresponding receptacle (12, 16), a guide element for the receptacle (16) arranged adjacent to the guide portion (26) at the contact surface (24) of the head part (21).