Ink Flow Path Coupling Mechanism for Leak-Safe Alignment
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Solution Overview
Problem
Existing inkjet recording apparatuses face challenges in efficiently connecting and disconnecting coupling members for ink circulation, leading to potential leaks and reduced reliability due to imperfect sealing and alignment.
Innovation Solution
A flow path connection mechanism featuring rotatable cylindrical coupling members with concavo-convex structures and biasing mechanisms, such as compression coil springs, ensures secure engagement and alignment, minimizing leaks through precise fitting and laser welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coupling members are connected using conventional methods, then the connection process is simple, but sealing reliability is poor leading to leaks
Solution Approach 1:
The connection mechanism is divided into distinct functional elements: external threads for connection, O-rings for sealing, and grooves for component positioning. This segmentation allows each element to perform its specific function optimally, improving sealing reliability while keeping the overall structure manageable.
Solution Approach 2:
The O-rings are pre-installed in the grooves of the coupling members before the connection process. This preliminary action ensures that sealing is already in place before the components are joined, preventing leaks from the outset and improving reliability without adding complexity to the connection act itself.
2Manufacturing precision
If coupling members use simple connection structures, then manufacturing is easier, but alignment precision is insufficient causing leaks
Solution Approach 1:
The connection mechanism uses external threads that extend beyond the minimum required for basic connection. This excessive threading provides additional engagement length that enhances alignment precision and ensures reliable connection, while the standard thread formulation keeps manufacturing processes simple and well-established.
Solution Approach 2:
The O-rings act as intermediary elements between the coupling members, filling minor alignment gaps and compensating for tolerances. This intermediary sealing element achieves high alignment precision in practice without requiring extremely tight manufacturing tolerances on the metal components themselves.
3Ease of operation
If coupling members are designed for easy connection, then operation is simpler, but connection security is reduced leading to potential leaks
Solution Approach 1:
The external threads are designed with sufficient length and engagement area to provide secure, leak-proof connection. This excessive threading ensures that even with simple hand operation, the connection achieves high security and reliability, preventing leaks while maintaining ease of operation.
Solution Approach 2:
The O-rings serve as intermediary sealing elements that enhance connection security without complicating the operation. They fill gaps and prevent leaks even if the mechanical connection has minor imperfections, maintaining both ease of operation and connection security.
Data Source
AI summary
A flow path connection mechanism includes a first coupling member, a second coupling member, and a connection member. The connection member is mounted to the second coupling member. The first and second coupling members each include a concavo-convex structure having irregularities in an axis direction. The first coupling member is inserted into the connection member, and thus the respective concavo-convex structures of the first and second coupling members engage with each other in a circumferential direction.