Oblique-Mouth Writing Instrument for Ink Flow and Line Variation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing writing instruments struggle to prevent defects such as scuffing and line skipping in handwriting while also failing to produce thick and unique drawn lines.
Innovation Solution
A writing instrument design with a container body having a bottom part and a mouth forming an obtuse angle, a flexible writing body, and a cap member, allowing for adjustable ink supply by changing the orientation of the container body, along with a writing part replacement unit for easy maintenance and customization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the container body and mouth are aligned axially for downward writing, then ink supply is smooth and uniform, but the writing instrument cannot produce thick or unique drawn lines
Solution Approach 1:
The patent applies the dynamics principle by making the container body rotatable, allowing the user to change the orientation between the container axis and the writing direction. This enables the system to adapt between different writing modes: axial alignment for uniform ink supply and oblique angles for thick/unique line effects, thus resolving the contradiction between ink supply precision and writing versatility
2Reliability
If the writing part has a large area for smooth ink supply, then scuffing and line skipping are suppressed, but the writing instrument cannot easily replace writing parts
Solution Approach 1:
The patent applies segmentation by dividing the writing instrument into separable components, specifically making the writing part detachable from the container body. This allows the writing part to be easily replaced when worn, while the container body with its optimized oblique mouth structure maintains the reliability of smooth ink supply and prevents scuffing/line skipping during use
3Adaptability or versatility
If the container body is made rotatable for angle adjustment, then writing versatility is improved, but device complexity increases
Solution Approach 1:
The patent implements a rotatable container body design that allows angle adjustment between the container axis and writing direction. This dynamic structure enables versatility in achieving different line thicknesses and writing effects without requiring multiple separate instruments, while the rotation mechanism adds manageable complexity to the overall device
Data Source
AI summary
The present invention provides a writing instrument that makes it possible to easily select a usage method in which writing defects such as line breakage or patchiness of writing (drawn line) can be suppressed or a usage method in which writing including patchiness etc. can be obtained. Provided is a writing instrument which comprises a container main body 2 for accommodating a writing ink, a writing body 7 disposed so as to block an opening part 2c of the container main body, and a cap member 4 removably fitted in the opening part and covering the writing body, and which is capable of writing on a writing surface via effusion of the ink in the container main body from the writing body, wherein: container main body is provided with a bottom part 2a, a trunk part 2b that is continuous with the bottom portion and that extends upward, and an opening part 2c that is continuous with the trunk part and that extends diagonally upward, and the angle of intersection of an axis line Ax1 of the container main body that is orthogonal to the surface of the bottom portion in the container main body and an axis line Ax2 of the opening part that passes through the center of the opening part is obtuse