Fluid Cartridge Latch Track for Low-Force Straight Insertion
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Solution Overview
Problem
Existing fluid cartridge locking mechanisms in printers consume significant space and require substantial force for engagement, leading to potential improper connections, leakage, and material wear due to the need for rotational alignment and deflection of engaging elements.
Innovation Solution
A fluid ejection system with a receiving structure and cartridge design that uses a guide track and latch track to facilitate one-dimensional insertion and locking, minimizing space consumption and reducing the required force through a latch and ejector mechanism that ensures proper alignment and secure connection without rotational movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional locking mechanisms (bail or deforming snap finger) are used to maintain air and liquid tight connections, then secure connection is achieved, but significant space is consumed within the printer and substantial force is required for engagement
Solution Approach 1:
The patent extracts the locking function from traditional complex mechanisms (bail or deforming snap finger) and implements it through a simplified latch mechanism that engages with a latch track, removing unnecessary components while maintaining connection security
Solution Approach 2:
The patent changes the engagement parameter from requiring substantial force with traditional mechanisms to requiring minimal force with the new latch mechanism, achieved through the geometric design of the latch track and latch interaction that provides mechanical advantage
2Reliability
If cartridge insertion involves rotational movement and deflection of engaging elements to align interfaces, then proper connection is achieved, but material wear or damage and leakage are likely to occur
Solution Approach 1:
The patent incorporates a guide track that preliminarily aligns the cartridge with the receiving structure during insertion, ensuring that fluid interfaces are properly positioned before the latch mechanism engages, thereby preventing misalignment-related leakage and wear
Solution Approach 2:
The guide track acts as an intermediary element between the cartridge and receiving structure, facilitating smooth insertion and proper alignment without requiring direct engagement between potentially damaging components
3Reliability
If traditional locking mechanisms are used, then secure connection is achieved, but the complexity of the mechanism increases and ease of operation decreases
Solution Approach 1:
The patent segments the connection process into distinct functional elements: a guide track for alignment, a latch track for positioning, and a simple latch for locking. This segmentation allows each element to perform its specific function efficiently, making the overall operation simpler while maintaining security
Data Source
AI summary
An ink cartridge for an inkjet printer includes a bottom face and a front face; an ink interface on the front face of the ink cartridge for connection to a cartridge receiving structure; a guide interface in the bottom face for guiding the cartridge along a straight line during insertion into the cartridge receiving structure for connecting the ink interface; a latch track disposed in the bottom face of the ink cartridge to guide a latch of the cartridge receiving structure; a latch stop disposed in the latch track for engaging the latch, where the latch track comprises a locking track and an unlocking track to accommodate movement of the latch with respect to the latch stop, the locking track being at least partly separate from the unlocking track; and a latch guide for redirecting the latch towards the locking track, rather than the unlocking track.