Breathable Core Nanopore Ink Leakage Prevention
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Solution Overview
Problem
Conventional writing pens with ink storage often have complex structures and high manufacturing costs due to the need for multiple parts to maintain air pressure balance and prevent ink leakage during writing.
Innovation Solution
A writing pen design featuring a simple structure with an air pressure balancing plug and breathable cores with nanopores, allowing ambient air into the ink storage compartment while preventing ink leakage, using a cylindrical breathable core with one end extending into the ink and the other communicating with ambient air, and a transfer core connected to the writing nib.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple parts (dust-proof plate, labyrinth breathable plug, nano-permeable plate, one-way valve) are used to achieve air communication and prevent ink leakage, then air pressure balance is maintained, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple separate components (dust-proof plate, breathable plug, nano-permeable plate, and one-way valve) into a single integrated breathable core. This core contains all necessary functional elements within one component, eliminating the need for separate parts while maintaining air pressure balance and preventing ink leakage. The merging principle directly resolves the technical contradiction by reducing device complexity while preserving reliability.
Solution Approach 2:
The breathable core performs multiple functions simultaneously: it acts as a dust-proof barrier, provides breathable air passage through nanopores, prevents ink leakage through surface tension, and maintains air pressure balance. This multi-functional design eliminates the need for separate specialized components, thereby reducing structural complexity while ensuring reliable operation.
2Reliability
If multiple parts and assembly procedures are used to prevent ink leakage and maintain air pressure, then writing reliability is improved, but manufacturing cost and assembly complexity increase
Solution Approach 1:
By integrating multiple functions into a single breathable core component, the patent reduces the number of parts that need to be manufactured and assembled. This simplification directly lowers manufacturing costs and reduces assembly complexity while maintaining writing reliability through the core's integrated dust-proof, breathable, and ink-blocking functions.
Solution Approach 2:
The breathable core utilizes nanoporous material with specific pore sizes (50-500 nm) that allow air molecules to pass through while blocking larger ink molecules through surface tension effects. This material-based solution provides reliable ink leakage prevention and air pressure balance without requiring complex mechanical assemblies, thereby reducing manufacturing cost.
3Device complexity
If a simple breathable core structure is used, then device complexity is reduced, but the ability to prevent ink leakage while allowing air passage may be compromised
Solution Approach 1:
The patent employs a breathable core with carefully controlled nanopores (50-500 nm in diameter) that exploit the physical principle of surface tension. The pore size is specifically designed to be smaller than ink molecule dimensions, creating capillary pressure that prevents ink leakage while allowing air molecules to pass freely. This material-based mechanism provides reliable ink leakage prevention within a simple single-component structure.
Solution Approach 2:
The breathable core's reliability in preventing ink leakage is achieved by optimizing specific parameters: pore diameter (50-500 nm), porosity (30-70%), and hydrophobicity. By adjusting these parameters, the core maintains a simple structure while ensuring that air can pass through freely but ink cannot, due to the surface tension effect at the optimized pore dimensions.
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 ensures fluent writing by maintaining air pressure balance within the ink storage compartment, reducing manufacturing costs and complexity while ensuring reliable performance.
Implementation Method 1
a breathable core having nanopores, the breathable core being inserted into the air pressure balancing plug with one end extending into ink and the other end communicating with ambient air
Implementation Method 2
diameter of the nanopores in the breathable core is larger than particle diameter of the ink
Data Source
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AI summary
A writing pen with ink storage is provided, comprising a writing nib, an ink storage compartment for storing ink, an ink inducing device for inducing ink into the writing nib, wherein the writing pen further comprises an air pressure balancing plug which is plugged in an open end of the ink storage compartment to seal ink, and a breathable core having nanopores, the breathable core being inserted into the air pressure balancing plug with one end extending into ink and the other end communicating with ambient air. The writing pen with ink storage of the present invention has simple structure, provides fluent writing and no ink leakage.