Liquid Cartridge Guide Groove Structure for Leak-Free Attachment

The patent divides the continuous peripheral surface contact into discrete point contacts by introducing guide grooves on the ink supply portion and corresponding guide projections on the cartridge attachment section. This segmentation reduces the contact area from an extensive peripheral surface to specific localized points, preventing wobbling while minimizing ink adhesion risk.

The guide grooves and guide projections act as intermediary elements that facilitate precise alignment between the ink supply portion and the cartridge attachment section. These intermediaries guide the insertion process and establish stable positioning without requiring extensive surface contact, thereby preventing both wobbling and ink leakage.

The patent segments the positioning interface by creating guide grooves and guide projections that establish discrete contact points. This segmentation provides precise positioning through defined geometric features while preventing wobbling by constraining movement to specific degrees of freedom during attachment.

The guide grooves and guide projections perform preliminary alignment and positioning actions during the insertion process. These features guide the ink supply portion into the correct position before final attachment, ensuring both positioning accuracy and attachment stability without requiring extensive surface contact.