Pen Tip Segmentation for Writing Direction Visibility
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Solution Overview
Problem
Conventional writing instruments face challenges in securing high visibility for writing direction recognition and ink flow stability, leading to difficulties in writing performance and durability, especially when trying to write to the end of the ink supply without blurring.
Innovation Solution
A writing instrument design featuring a pen tip with a porous member and a holding member that includes an ink guiding part, where the holding member is a visible part with a specific area ratio, and a relay porous member for efficient ink feeding, ensuring high visibility and stable ink flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the visible part area is enlarged to improve writing direction visibility, then visibility is improved, but the writing part area is enlarged causing line marker performance to deteriorate
Solution Approach 1:
The patent divides the pen tip into functionally independent segments: a transparent holding member for visibility, a porous writing part for ink delivery, and an ink guiding part for ink flow control. This segmentation allows each part to be optimized for its specific function without compromising others, resolving the contradiction between visibility and line marker performance.
Solution Approach 2:
The patent applies local quality by making the holding member transparent specifically in the region where visibility is needed, while maintaining the writing part's ink delivery properties in its own region. The ink guiding part is positioned to provide structural support without interfering with either visibility or writing performance, allowing each local region to have the properties needed for its specific function.
2Stability of the object's composition
If the ink guiding part cross-sectional area is increased to improve ink flow stability, then ink flow stability is improved, but the visible part area ratio decreases causing visibility to deteriorate
Solution Approach 1:
The patent segments the ink delivery system into a porous writing part for stable ink flow and a transparent holding member for visibility. The ink guiding part is designed with a cross-sectional area smaller than the writing part, allowing it to provide structural support and ink flow guidance without significantly reducing the visible area ratio, thus maintaining both ink flow stability and visibility.
3Ease of manufacture
If the pen tip structure is simplified to improve ease of manufacture, then ease of manufacture is improved, but ink flow control and visibility are compromised
Solution Approach 1:
The patent merges multiple functions into the holding member: it serves as both a structural support element and a transparent window for visibility. The ink guiding part is integrated into the holding member, combining ink flow guidance with structural support. This merging reduces the number of separate components needed, simplifying manufacture while maintaining reliable ink flow control and visibility through the integrated design.
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 design enhances visibility and durability, allowing for clear writing direction recognition and stable ink flow to the end of the ink supply, preventing blurring and ensuring effective ink exhaustion.
Implementation Method 1
an ink guiding part (50) for feeding an ink to the writing part... a relay porous member (30) for feeding an ink contained in a writing instrument main body (10) to the ink guiding part (50)
Data Source
AI summary
In order to provide a writing instrument in which a writing direction can be visually recognized in a broad range at a visual part of a pen tip and which can surely write to end of writing, the writing instrument is endowed with a constitution in which a pen tip is equipped with a porous member as a writing part and a holding member holding the above porous member and having at least one ink guiding part through which an ink contained in a barrel is provided to a writing part held by the holding member which is a visible part enabling to visually recognize a writing direction, wherein an area ratio of the visible part is 40% or more of the pen tip protruding from a tip part of the writing instrument.