Liquid Discharge Head Coupling Structure Against Peeling and Leakage

The bonding structure is segmented into multiple coupling portions distributed along the liquid channel, rather than relying on a single continuous bonding interface. This segmentation distributes the peeling forces across multiple locations, preventing concentration of stress at any single bonding point while maintaining the structural integrity needed for high-pressure liquid discharge.

The coupling portions extend in the thickness direction of the nozzle plate, creating a three-dimensional bonding structure rather than a two-dimensional surface bond. This dimensional extension increases the bonding area and provides mechanical interlocking between the nozzle plate and housing, significantly improving resistance to peeling forces generated by multiple nozzle arrays.

The bonding interface is divided into multiple discrete coupling portions along the liquid channel, which distributes liquid pressure and prevents concentration of stress at any single bonding location. This segmentation eliminates continuous leakage paths that would occur with a single large bonding interface under high pressure.

By extending coupling portions into the thickness direction, the bonding structure creates a three-dimensional seal that prevents liquid penetration through the bonding interface. The vertical extension of coupling portions provides mechanical interlocking that maintains sealing effectiveness under high-pressure discharge conditions.

The bonding area is segmented into multiple discrete coupling portions rather than forming one large continuous bond. This segmentation achieves adequate total bonding area while simplifying the manufacturing process, as each discrete coupling portion can be formed independently using standard molding techniques without requiring complex multi-step bonding procedures.

The coupling portions are integrated directly into the housing structure as a single molded component, combining the bonding function with the structural housing. This merging eliminates the need for separate bonding operations, adhesives, or additional reinforcement elements, thereby improving reliability through increased bonding area while avoiding the complexity of multi-component assemblies.