Liquid Discharge Head Mounting Geometry for Precise Replacement

The patent applies preliminary action by pre-configuring the support member with both reference members (for positioning) and pressed portions (for securing) before the liquid discharge head is mounted. The reference members are positioned at predetermined locations that establish accurate positioning, while the pressed portions are pre-positioned to apply securing forces. This preliminary arrangement ensures that when the head is simply attached, both accurate positioning and secure mounting are achieved simultaneously without requiring complex adjustment procedures during replacement.

The patent applies local quality by distributing the securing function to multiple discrete pressed portions (first, second, and third pressed portions) positioned at different locations on the support member. Each pressed portion applies localized securing force to specific areas of the liquid discharge head, preventing concentrated stress that could cause positioning deviation. The reference members are also positioned at specific locations (first end portion and second end portion) to provide localized positioning references. This distributed approach ensures both secure mounting and maintained positioning accuracy.

The patent applies universality by designing the support member to perform multiple functions simultaneously: it provides positioning through reference members, securing through pressed portions, and structural support. The reference members serve both as positioning references and as structural elements of the support member. The pressed portions not only secure the head but also define the mounting geometry. This multi-functional design achieves accurate positioning and secure mounting without requiring separate complex positioning mechanisms, thereby maintaining simplicity while ensuring precision.