Liquid Discharge Head Orthogonal Channel Layout
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Solution Overview
Problem
In ink-jet recording heads, the overlap of pressure generating chambers and circulating channels in the up-down direction can lead to insufficient loading and unsatisfactory joining of plates, potentially resulting in structural weaknesses and poor assembly.
Innovation Solution
A liquid discharge head design where the first and second common channels overlap in the up-down direction, with the pressure chambers positioned orthogonally to both, ensuring proper loading and joining of plates, and incorporating throttles and dampers to manage ink flow and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the pressure generating chambers and circulating channel overlap in the up-down direction to make the head compact, then the head size is reduced, but sufficient load cannot be applied to the plates around these chambers and channels, leading to unsatisfactory joining
Solution Approach 1:
The patent positions the pressure generating chambers and circulating channels in different planes (one in front, one in the rear) rather than overlapping them in the same vertical space. This spatial rearrangement in the depth dimension allows both components to coexist without interfering with the load application path, thereby maintaining compact overall dimensions while ensuring sufficient joining strength of the plates.
2Volume of moving object
If the pressure generating chambers and circulating channel overlap in the up-down direction, then the head can be made compact, but the structural integrity and assembly quality deteriorate due to insufficient loading
Solution Approach 1:
By relocating the pressure generating chambers and circulating channels to different depth planes (front and rear respectively), the patent eliminates the overlap issue that compromises assembly quality. This dimensional reorganization ensures that load can be properly applied to plate joining areas while maintaining the compact form factor, thus improving reliability without sacrificing space efficiency.
Data Source
AI summary
A liquid discharge head includes a stacked body formed by plates stacked in a first direction, and having a liquid channel. The liquid channel includes: individual channels which include nozzles and pressure chambers communicating with the nozzles, respectively, and which are aligned in a second direction orthogonal to the first direction; a first common channel extending in the second direction and communicating with the individual channels; a second common channel extending in the second direction and communicating with the individual channels; first throttles each connecting one of the individual channels and the first common channel; and second throttles each connecting one of the individual channels and the second common channel. The plates include: a nozzle plate having the nozzles; a pressure chamber plate having the pressure chambers; a first common channel plate having the first common channel; and a second common channel plate having the second common channel.