Vent-Regulated Ink Delivery System for Leakage Prevention
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Solution Overview
Problem
Conventional marker pens face ink leakage issues due to large ink cartridge volumes, which are mitigated by using smaller cartridges to prevent leakage, but this limits ink storage capacity, affecting user experience.
Innovation Solution
A writing instrument design featuring a pen cap, pen tip, and pen barrel with an ink delivery assembly including a first and second tube body, liquid guiding column, and liquid absorbent cotton, where vents on the tube bodies regulate air flow to control ink level and prevent leakage, allowing for increased ink storage without leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the volume of the ink cartridge is increased to improve ink storage capacity, then the ink storage is improved, but the ink may ooze from the pen tip causing leakage
Solution Approach 1:
The ink delivery system is segmented into multiple functional zones: the ink cartridge, first tube body with liquid guiding column, second tube body with vents, and liquid absorbent cotton. This segmentation allows each component to perform its specific function - the vents in the second tube body create air pressure regulation zones that prevent ink from overflowing while the liquid guiding column controls ink flow, resolving the contradiction between large storage and leakage prevention
Solution Approach 2:
The liquid absorbent cotton acts as an intermediary component between the ink delivery system and the pen tip. It absorbs excess ink and regulates the ink flow to the pen tip, preventing leakage while allowing smooth writing. The cotton serves as a buffer that mediates between the ink pressure from the large cartridge and the writing surface
2Object-generated harmful factors
If the volume of the ink cartridge is decreased to prevent ink leakage, then the ink leakage is prevented, but the ink storage capacity is reduced
Solution Approach 1:
The patent applies pneumatic principles by incorporating vents in the second tube body that allow air to enter and create pressure balance. The air pressure regulated through the vents counteracts the gravitational force on the ink, preventing overflow while enabling the use of a larger ink cartridge for increased storage capacity
Solution Approach 2:
The patent changes the physical parameters of the ink delivery system by introducing air pressure regulation through vents and using liquid absorbent cotton to modify ink flow characteristics. These parameter changes allow the system to handle larger ink volumes without leakage by controlling the ink's movement through pressure balance and absorption
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 smooth writing by controlling ink flow and preventing leakage, enabling a nearly 200% increase in ink storage capacity while maintaining user experience by using vents to manage ink volume and air pressure.
Implementation Method 1
liquid absorbent cotton is arranged inside the first tube body
Implementation Method 2
an air flow channel is formed between an inner wall of the pen barrel and the first tube body
Implementation Method 3
the ink will flow downwards through gravity from the ink cartridge by its own weight
Data Source
AI summary
Provided is a writing instrument including a pen cap, a pen tip and a pen barrel, wherein the pen tip is arranged at one end of the pen barrel, an ink cartridge configured to store ink is formed at the other end of the pen barrel, and the pen cap able to be removed is provided on the pen barrel for covering the pen tip; wherein the writing instrument further includes: an ink delivery assembly including a first tube body, a second tube body, a liquid guiding column and liquid absorbent cotton, wherein the second tube body is inserted into the first tube body, the liquid guiding column is inserted into the second tube body, the liquid absorbent cotton is arranged inside the first tube body, an inner end of the pen tip is inserted into the first tube body, and an end of the first tube body which is away from the pen tip is opened with a first vent and an end of the second tube body which is close to the pen tip is opened with a second vent; the first tube body is arranged in the pen barrel; an air flow channel is formed between an inner wall of the pen barrel and the first tube body; the second tube body is in communication with the ink cartridge; a part of the pen barrel corresponding to where the pen tip is arranged is provided with a plurality of ribs, and an air inlet is enclosed by the pen tip and any two adjacent ribs, and the air inlet is in communication with the air flow channel. The writing instrument could increase ink storage capacity and avoid ink leakage, thereby improving user experience.