Multi-Posture Bedside Pen Using Capillary Ink Delivery
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Solution Overview
Problem
Traditional writing pens are not suitable for use in anti-gravity conditions, such as when lying down, as they rely on gravity for ink flow, and existing space pens are complex and costly.
Innovation Solution
A multi-posture bedside writing pen with a pen shell, pen tip holder, fiber rod, and fiber ink storage tube, utilizing a leak-proof membrane and siphon bionics principle to supply ink without gravity, ensuring ink containment and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional pens use gravity-based ink flow, then the structure is simple, but they cannot be used in anti-gravity conditions like lying down
Solution Approach 1:
The patent replaces the gravity-based mechanical ink flow system with a capillary action-based ink delivery system. The fiber rod with porous structure enables ink to flow through capillary forces rather than gravity, allowing the pen to function in any orientation without requiring complex mechanical adjustments or pressurization mechanisms.
Solution Approach 2:
The patent employs a porous fiber rod as the core ink delivery mechanism. The porous structure of the fiber rod enables capillary action to draw ink from the storage chamber to the writing tip, eliminating dependence on gravity and enabling multi-posture writing capability while maintaining structural simplicity.
2Adaptability or versatility
If pencils are used for anti-gravity writing, then writing is possible, but the refill is easy to break causing safety hazards
Solution Approach 1:
The patent uses a porous fiber rod instead of a solid graphite refill. This porous structure provides both the anti-gravity writing capability through capillary action and significantly improved durability, as the flexible fiber material resists breaking compared to brittle graphite refills, eliminating the safety hazard of broken refills entering the respiratory tract.
Solution Approach 2:
The patent employs composite material construction with the fiber rod made from porous polymer or composite materials that combine the properties of capillary action for ink delivery with high mechanical flexibility and durability, resolving the contradiction between anti-gravity functionality and refill strength.
3Reliability
If space pens use spring and grease layers for microgravity writing, then ink leakage is prevented, but the structure is complicated and costs are high
Solution Approach 1:
The patent eliminates the complex spring-based pressurization system and grease layer structure of traditional space pens by using capillary action through a porous fiber rod. This passive ink delivery mechanism inherently prevents leakage in any orientation without requiring active mechanical components, dramatically simplifying the structure while maintaining reliability.
Solution Approach 2:
The porous fiber rod structure enables self-regulating ink flow through capillary forces that automatically adjust to prevent over-pressurization and leakage. The system is self-regulating without requiring springs, valves, or other active components to control ink pressure, achieving leakage prevention through passive physical principles.
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
Enables writing in multiple postures, including lying down, while preventing ink leakage and simplifying the structure and production process, ensuring environmental sanitation and cost-effectiveness.
Implementation Method 1
by using the siphon bionics principle, the limitation of ink injection of ordinary pens by gravity is overcome, and the fiber rod is supplied with ink
Implementation Method 2
The leak-proof membrane is located in the first gap, and the outer peripheral wall of the fiber rod located in the first gap is coated with a leak-proof membrane
Data Source
AI summary
A multi-posture bedside writing pen includes a pen shell, a pen tip holder, a fiber rod and a fiber ink storage tube. The fiber ink storage tube is connected with the pen shell and located in the pen shell. The pen tip holder is connected with one end of the pen shell. The pen tip holder is axially provided with a through hole. The fiber rod is inserted into the through hole, one end of the fiber rod is exposed outside the pen tip holder, and an other end of the fiber rod is inserted into the fiber ink storage tube. A first gap is provided between the pen tip holder and the fiber ink storage tube.