Sheet-Member Stacked Structure for Ink Jet Printer Heads
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Solution Overview
Problem
Conventional ink jet printer heads face issues such as ink leakage and defective adhesion due to sheet member deformation and uneven adhesive distribution, leading to inaccurate image recording and increased production costs.
Innovation Solution
A sheet-member stacked structure is developed where lead frames with specific bridge connections and relief grooves and holes are used to prevent sheet member deformation and ensure uniform adhesive distribution, eliminating gaps and enhancing the flatness of the printed surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sheet members are stacked and adhered to form a channel unit, then the total number of ink ejection nozzles increases and printing speed improves, but sheet member deformation occurs causing gaps and ink leakage
Solution Approach 1:
The patent applies local quality by creating relief grooves at specific locations where adhesive is applied, and providing relief holes at corners of sheet members. These localized structural modifications ensure proper adhesive distribution and prevent deformation at critical areas, resolving the contradiction between maintaining adhesion quality and achieving high printing speed through multi-nozzle arrays.
Solution Approach 2:
The patent implements preliminary action by pre-forming relief grooves and relief holes in the sheet members before stacking and adhesion. This advance preparation ensures that adhesive is properly distributed and trapped air can escape during the adhesion process, preventing gaps and deformation that would otherwise occur when stacking multiple sheet members for high-speed printing.
2Strength
If adhesive is applied to contact surfaces of sheet members, then sheet members are adhered and fixed to each other, but uneven adhesive distribution causes gaps and defective adhesion
Solution Approach 1:
The patent applies local quality by creating relief grooves at specific locations where adhesive is applied. These grooves ensure that adhesive is properly distributed and trapped air can escape during the adhesion process, preventing gaps and deformation that would otherwise occur when stacking multiple sheet members for high-speed printing.
Solution Approach 2:
The patent utilizes porous-like structures by providing relief holes through which trapped air can escape during adhesion. This allows uniform adhesive distribution without air pockets, ensuring consistent adhesion strength across all sheet member contacts.
3Ease of operation
If bridge portions are made thin to connect sheet members to frame portion, then sheet members can be easily positioned, but sheet members become sharply curved or deformed during assembly
Solution Approach 1:
The patent implements preliminary action by pre-forming relief grooves and relief holes in the sheet members before stacking and adhesion. This advance preparation ensures that adhesive is properly distributed and trapped air can escape during the adhesion process, preventing gaps and deformation that would otherwise occur when stacking multiple sheet members for high-speed printing.
Solution Approach 2:
The patent applies local quality by creating relief grooves at specific locations where adhesive is applied. These grooves ensure that adhesive is properly distributed and trapped air can escape during the adhesion process, preventing gaps and deformation that would otherwise occur when stacking multiple sheet members for high-speed printing.
4Productivity
If multiple lead frames are stacked to increase nozzle count, then printing speed increases, but external forces cause sheet member curvature and deformation
Solution Approach 1:
The patent implements preliminary action by pre-forming relief grooves and relief holes in the sheet members before stacking and adhesion. This advance preparation ensures that adhesive is properly distributed and trapped air can escape during the adhesion process, preventing gaps and deformation that would otherwise occur when stacking multiple sheet members for high-speed printing.
Solution Approach 2:
The patent applies local quality by creating relief grooves at specific locations where adhesive is applied. These grooves ensure that adhesive is properly distributed and trapped air can escape during the adhesion process, preventing gaps and deformation that would otherwise occur when stacking multiple sheet members for high-speed printing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution prevents ink leakage, improves the yield of ink jet printer heads by ensuring accurate adhesion and uniform adhesive distribution, and reduces production costs by simplifying the manufacturing process.
Implementation Method 1
stacking a plurality of sheet members on each other via an adhesive material, so that contact surfaces of each pair of adjacent sheet members of the stacked sheet members are adhered to each other with the adhesive material
Data Source
AI summary
A sheet-member stacked structure produced by a method including one or more of the following steps: stacking lead frames on each other, and stacking sheet members of one lead frame on sheet members of another or other lead frame or frames, each lead frame including a frame portion, the sheet members, and bridge portions which connect sides of the sheet members; to an inner peripheral portion of the frame portion and one of its adjacent sheet member, or to respective one sides of its two adjacent sheet members; stacking sheet members on each other via an adhesive; and stacking sheet members on each other, the sheet members including a liquid-chamber sheet member formed of a rolled metal sheet and having liquid chambers arranged, separately from each other, in a direction perpendicular to a direction of rolling of the metal sheet.