Pen Tip Ink Feeder Capillary Action Viewer Area
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Solution Overview
Problem
Existing writing implements with pen tips that allow visual recognition of the writing direction face challenges in maintaining ink flowability while ensuring an adequate effective area for visual recognition, often requiring thicker ink feeders that obstruct the viewer portion.
Innovation Solution
A writing implement with a sheet-shaped ink feeder featuring slits or bumps on its surface and inside, produced using methods like nano imprinting or photolithography, which enhances capillary action and ink flow without thickening the ink feeder, allowing for efficient ink supply and enlarged viewer area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ink feeder is made thick to improve ink flowability, then ink outflow performance is improved, but the effective area of the viewer portion is reduced
Solution Approach 1:
The patent applies porous materials by forming numerous through-holes (capillary pores) in the ink feeder. These pores enable ink to flow through the ink feeder via capillary action, eliminating the need for a thick ink feeder structure. The porous structure provides sufficient ink flowability while maintaining a thin profile that does not obstruct the viewer portion, thus resolving the contradiction between ink outflow performance and viewer area.
Solution Approach 2:
The patent changes the structural parameters of the ink feeder by introducing through-holes with specific dimensions (diameter 0.01-1.0 mm, length-to-diameter ratio 0.1-10.0). This parameter modification enables the ink feeder to achieve adequate ink flowability with a reduced thickness, allowing the viewer portion to have a larger effective area without compromising ink supply performance.
2Reliability
If the ink passage is thickened to improve ink outflow, then ink flowability is improved, but the viewer portion is obstructed
Solution Approach 1:
The patent replaces the conventional solid ink passage with a porous structure containing numerous through-holes. This porous configuration enables ink to flow freely through capillary action while maintaining a thin overall structure. The thin structure does not obstruct light transmission through the viewer portion, thereby preserving visual recognition clarity while ensuring adequate ink flowability.
Solution Approach 2:
The patent substitutes the mechanical ink delivery system (relying on pressure and thick passages) with a capillary action-based system. The capillary pores replace the need for thick mechanical ink passages, enabling ink flow through surface tension and capillary forces rather than mechanical pressure, thus achieving both good ink flowability and thin structure for clear visual recognition.
3Area of stationary object
If the ink feeder is made thin to enlarge viewer area, then visual recognition area is improved, but ink flowability deteriorates
Solution Approach 1:
The patent employs porous materials by creating a network of through-holes throughout the ink feeder. This porous structure compensates for the reduced thickness by providing multiple parallel pathways for ink flow. The cumulative effect of numerous capillary pores ensures adequate ink supply capacity even though the overall ink feeder thickness is reduced to enlarge the viewer area.
Solution Approach 2:
The patent segments the ink flow path into numerous individual capillary pores distributed throughout the ink feeder. This segmentation creates many parallel ink flow channels, increasing the total ink flow capacity despite the thin overall structure. The segmented pore structure enables the ink feeder to be thin while maintaining sufficient ink flowability for the enlarged viewer area.
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 achieves both excellent ink outflow performance and an increased effective area for visual recognition, preventing excessive drawing and ensuring clear visibility of the writing direction without obstructing the viewer portion.
Implementation Method 1
a sheet-shaped ink feeder formed with slits or bumps on the surface and inside thereof to produce a capillary action
Data Source
AI summary
A writing implement having a pen tip that can achieve excellent ink outflow performance and an increase in the effective area of a viewer portion allowing recognition of the writing direction, relative to the whole pen tip. The writing implement is a writing implement A which includes a pen tip 20 feeding ink from a writing implement body 10 and having a viewer portion through which the writing direction can be recognized, and is characterized in that the pen tip 20 is configured of, a least, a writing part 30 and a holding body 40 having a viewer portion 43, and the holding portion 40 has a sheet-shaped ink feeder 25 formed with slits or bumps on the surface and inside thereof to produce a capillary action.