Compact Ballpoint Pen With Nested Ink Cartridge
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Solution Overview
Problem
Conventional long ballpoint pens are difficult to remove from pockets due to trapping issues and require inconvenient hand movements to access the nib for writing.
Innovation Solution
A compact ballpoint pen design with a modified push button that allows the ink cartridge to be inserted into the button, reducing the overall length and enabling easier pocket access and immediate writing without hand movement from the button side to the nib side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a long ballpoint pen is used, then the button is easily accessible, but the pen is difficult to remove from pockets due to trapping issues
Solution Approach 1:
The ink cartridge is inserted into the push button structure, with the cartridge positioned inside the button housing. This nesting arrangement allows the button mechanism to contain the ink supply, eliminating the need for a long external cartridge while maintaining full functionality of both the writing tip and button operation
Solution Approach 2:
The push button and ink cartridge are merged into a single integrated structure where the button serves dual purposes: as the actuation mechanism for extending the nib and as the housing for the ink cartridge. This combination reduces the overall pen length while preserving button accessibility
2Quantity of substance
If a long ballpoint pen is used, then the ink cartridge can be adequately supplied, but the pen requires inconvenient hand movements to access the nib for writing
Solution Approach 1:
The ink cartridge is nested within the push button housing, positioned such that the ink supply channel extends through the button structure to reach the nib. This internal arrangement maintains adequate ink capacity while bringing the writing tip within easy reach of the user's fingers
Solution Approach 2:
The ink cartridge is oriented vertically within the button housing rather than horizontally along the pen barrel, utilizing the vertical dimension of the button structure to accommodate sufficient ink volume while keeping the overall pen length short and the nib accessible
3Length of moving object
If a compact ballpoint pen is created by inserting ink cartridge into push button, then the pen length is reduced, but the button structure becomes more complex
Solution Approach 1:
The push button is designed to serve multiple functions simultaneously: it acts as the actuation mechanism for nib extension, provides structural housing for the ink cartridge, and serves as the mounting point for the spring mechanism. This multi-functionality reduces the need for separate components, simplifying the overall structure despite the compact arrangement
Solution Approach 2:
The button structure is divided into distinct functional segments: an upper actuation portion for finger pressure, a middle section housing the spring mechanism, and a lower portion containing the ink cartridge interface. This segmentation allows each component to be optimized independently while maintaining a compact integrated form
Data Source
AI summary
A compact ballpoint pen in which a bar of a push button is split into left and right bars and thus an ink cartridge can be inserted into a space between the split bars. Thus, the length of a ballpoint pen is reduced.