Multicolor Pen Automatic Return Mechanism for Nib Protection
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Solution Overview
Problem
Conventional multicolor writing instruments face issues where exposed nibs of pen cores can be damaged or clothes can be stained with ink when the instrument is clipped onto clothing, leading to reliability and usability problems.
Innovation Solution
A multicolor writing instrument with an automatic return function, featuring a clip member, return member, and auxiliary member that automatically retract all pen cores and knobs into the housing when the instrument is clipped, using a coil spring and guide channels to prevent nib exposure and ink contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the multicolor writing instrument is equipped with multiple pen cores and knobs in a limited space, then the versatility and functionality of the writing instrument is improved, but the complexity of the device increases
Solution Approach 1:
The patent implements nesting by placing multiple pen cores (50) and their corresponding knobs (60) within the limited space of the housing (20, 10). The pen cores are arranged in parallel within the upper housing, with each knob positioned to control its respective pen core. This nested arrangement allows multiple colors to be accommodated in a compact configuration without significantly increasing the overall device footprint.
Solution Approach 2:
The patent applies segmentation by dividing the housing into distinct functional zones: an upper housing (20) containing multiple pen cores and knobs, and a lower housing (10) containing the clip member (30) and return member (80). Each pen core has its own dedicated knob and guide hole, allowing independent operation. This segmentation enables complex multicolor functionality while maintaining organized, manageable structure within the limited space.
2Ease of operation
If the nib of a pen core is exposed to the outside for writing, then the ease of operation is improved, but the reliability deteriorates due to potential damage to the nib and clothes
Solution Approach 1:
The patent implements preliminary action through the automatic return function. When the clip member (30) is engaged with clothing, the return member (80) automatically pushes all pen cores (50) and knobs (60) back to their initial retracted positions before use. This preliminary retraction action prevents the nib from being exposed to damage during storage and transport, while still allowing easy exposure when needed for writing.
Solution Approach 2:
The patent applies self-service through the automatic return mechanism. The system uses the engagement of the clip member with clothing as a trigger to automatically retract all pen cores without requiring manual intervention. The return member (80) is positioned to automatically contact all knobs (60) and push them back, making the protection function autonomous and reliable.
3Reliability
If a return spring is used to automatically retract pen cores and knobs, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by making the return member (80) a multi-functional component. The return member serves multiple purposes: it acts as a structural support element, a mechanical actuator to push all pen cores back, and a positioning mechanism. By designing the return member to handle all pen cores simultaneously, the patent reduces the need for multiple separate return springs, thereby limiting the increase in device complexity while maintaining reliable automatic return functionality.
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
Ensures the nibs of pen cores are safely housed, preventing damage and ink stains on clothing, enhancing the product's reliability and extending its service life without increasing manufacturing costs.
Implementation Method 1
a coil spring (40) resiliently installed between the clip member (30) and the upper housing (20)
Implementation Method 2
a return spring (70) resiliently installed between the pen core (50) and the knob (60)
Data Source
AI summary
A multicolor writing instrument with an automatic return function includes a lower housing having a hollow cylindrical shape; an upper housing connected to an upper portion of the lower housing and formed with locking steps; a clip member hingedly provided on the upper housing so as to be movable about a hinge shaft; a coil spring resiliently installed between the clip member and the upper housing; pen cores filled with at least two different color inks; knobs having ends fitted into the respective pen cores; return springs resiliently installed between the pen cores and the knobs; and a return member formed integrally with the clip member on one side of the hinge shaft and toward the respective knobs.