Pressurizing Mechanism Ventilation Recess Prevents Clogging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pressurizing mechanisms in writing utensils often malfunction due to clogging of the ventilation passage and gap, leading to incomplete decompression and ink leakage.
Innovation Solution
A writing utensil with a pressurizing mechanism featuring an annular valve element and a cylinder with a ventilating recess, allowing for a wide ventilation flow path and secure decompression by sealing and unsealing the pressurizing chamber, preventing clogging and ensuring smooth decompression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a narrow gap is used for the ventilation passage around the valve element, then the sealing performance is improved, but foreign matter easily clogs the passage causing malfunction
Solution Approach 1:
The invention transitions from a linear gap structure to a multi-dimensional recess structure. The ventilating recess is formed with a bottom and side walls, creating a three-dimensional space that allows air to flow through multiple paths while maintaining a wide opening, thereby preventing clogging while ensuring sealing performance.
Solution Approach 2:
The ventilating recess is divided into multiple segments or paths within the recess structure, allowing air to flow through different routes. This segmentation prevents foreign matter from blocking the entire ventilation path while maintaining effective sealing when the valve element closes the opening.
2Object-affected harmful factors
If the ventilation passage is made wide to prevent clogging, then decompression is improved, but sealing performance deteriorates
Solution Approach 1:
By creating a recess with depth rather than a simple surface opening, the invention achieves a wide effective ventilation area without compromising sealing. The valve element seals against the opening at the top of the recess, while the recess provides multiple internal flow paths that prevent clogging.
3Ease of operation
If the cylinder moves back and forth to pressurize and decompress the refill, then ink flow control is improved, but foreign matter clogs the ventilation passage causing malfunction
Solution Approach 1:
The recess structure provides a three-dimensional ventilation space that maintains wide openings for air flow during the decompression phase of cylinder movement, preventing foreign matter from blocking the ventilation passage while enabling reliable ink flow control through pressurization and decompression cycles.
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 ensures smooth decompression of the pressurizing chamber, preventing ink leakage and improving the airtightness and productivity of the writing utensil, while also allowing for easy refill replacement and reduced frictional resistance.
Implementation Method 1
When the cylinder moves forward, the valve element is brought into pressure contact with the non-pressure contact face to seal the pressurizing chamber
Implementation Method 2
When the cylinder moves backward, the valve element is moved forward and separated from the non-pressure contact face such that the ventilating recess communicates with the pressurizing chamber
Implementation Method 3
The cylinder is provided in such a manner that it comes into sliding contact with an outer peripheral part of the valve element and move back and forth
Data Source
AI summary
In a writing utensil with a pressurizing mechanism, a cylinder is provided such that it comes into sliding contact with an outer peripheral part of a valve element and moves back and forth. An inner wall face of the cylinder is provided with a ventilating recess communicating with outside air, and an annular non-pressure contact face is positioned on the rear side of the ventilating recess. When the cylinder moves forwardly, the valve element is brought into pressure contact with the non-pressure contact face to seal the pressurizing chamber and when the cylinder moves backwardly, the valve element is moved forward and is separated from the non-pressure contact face, such that the ventilating recess communicates with the pressurized chamber.