Conical NIB Tip Alignment and Ink Leakage Prevention
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Solution Overview
Problem
Writing instruments with conical nibs face challenges in tip alignment precision, roundness, and ink leakage due to ink accumulation between the nib and ink relay core, caused by gravity and capillary action, leading to issues like scratchy writing and ink leakage.
Innovation Solution
A conical nib manufactured by bending and shaping a punched plate into a tubular form with a hollow conical body, featuring narrow gaps and a protrusion-recess system or sawtooth-shaped portions to prevent misalignment and ink accumulation, along with a core cover to fill the space between the nib and ink relay core, ensuring precise alignment and preventing ink leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the nib is manufactured by bending and shaping a punched plate, then the manufacturing process is simplified and productivity is improved, but misalignment occurs at the joint edges resulting in decreased writing precision
Solution Approach 1:
The invention introduces asymmetric protrusion and recess structures at the joint edges of the punched plate. The protrusion extends from one joint edge into the other joint edge, creating an asymmetric interlocking mechanism that prevents misalignment during bending and shaping, thereby maintaining high writing precision while enabling efficient punched plate manufacturing
2Reliability
If the ink relay core is inserted in the hollow of the nib, then ink supply is improved, but ink accumulates in the space between the nib and ink relay core causing leakage
Solution Approach 1:
The invention extracts and removes the harmful space between the nib and ink relay core by introducing a filling member that occupies this gap. This eliminates the cavity where ink would otherwise accumulate due to gravity and capillary action, preventing ink leakage while maintaining reliable ink supply through the ink relay core
3Adaptability or versatility
If the combtooth-like pieces are gradually tapered to form a conical shape, then the nib can write in many directions, but the roundness of the nib piece is insufficient resulting in scratchy writing
Solution Approach 1:
The invention applies preliminary action by pre-forming the punched plate with controlled curvature and rounded joint edges before bending and shaping. This preliminary preparation ensures that when the plate is formed into the conical nib shape, the combtooth-like pieces maintain proper roundness and smoothness, enabling multi-directional writing without scratchy performance
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 enhances writing precision, prevents ink leakage, and maintains ink flow by ensuring accurate alignment and filling the space between the nib and ink relay core, resulting in smoother writing and improved durability.
Implementation Method 1
The ink relay core having capillary action to a front end thereof is inserted in a hollow of the nib
Data Source
AI summary
A nib piece with high roundness is obtained in the following manner: in the forming of the nib piece, a punched hole is formed in a base portion of a punched plate which is to be bent; the base portion of the punched plate is bent and shaped into a tubular structure; a pipe member which is aligned with and accommodated in the tubular body, is disposed in an inner portion of the base portion of the punched plate having been bent; and the punched plate is shaped to obtain a structure to wrap an outer periphery of the pipe member. The punched plate includes an engageable joint portion, such as a protrusion and a recess, which engage each other and form a hooked edge when the punched plate is bent into a cylindrical form.