Adjustable Pen Body With Collet Retention For Universal Cartridge Fit
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Solution Overview
Problem
Users face difficulties in finding compatible replacement ink cartridges for pens due to the lack of available information and dimensional compatibility issues, leading to potential incorrect fits.
Innovation Solution
A pen body design featuring an adjustable outer barrel with an adjustment cylinder and a collet system that compressively engages the ink cartridge, allowing for universal compatibility and adjustable length to accommodate different cartridge dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-dimensional pen body is used with standard ink cartridges, then the structure is simple and easy to manufacture, but the pen cannot accommodate different cartridge dimensions leading to compatibility issues
Solution Approach 1:
The pen body incorporates an adjustable barrel length mechanism that allows the user to extend or retract the barrel to match the length of different ink cartridges. This dynamic adjustment capability enables the same pen body to accommodate multiple cartridge dimensions, directly resolving the compatibility issue while maintaining a relatively simple overall structure.
Solution Approach 2:
The pen body is designed with universal adaptability through its adjustable mechanism, allowing a single pen body design to serve multiple functions by accommodating different cartridge types and sizes. This multi-functionality approach eliminates the need for multiple specialized pen bodies, thereby improving versatility without proportionally increasing complexity.
2Adaptability or versatility
If an adjustable barrel length mechanism is added to accommodate different cartridges, then cartridge compatibility is improved, but the device complexity increases
Solution Approach 1:
The adjustable barrel length mechanism employs a dynamic design where the barrel can be extended or retracted through user interaction. This allows the pen body to adapt to different cartridge lengths without requiring a completely redesigned structure for each cartridge type, balancing adaptability with manageable complexity.
Solution Approach 2:
The mechanism changes the physical parameter of barrel length to match different cartridge dimensions. By adjusting this single parameter, the pen body can accommodate various cartridge sizes without fundamentally altering its structure, thereby limiting the increase in device complexity.
3Reliability
If a collet system with multiple annular rings is used to secure the cartridge, then the grip strength and security are improved, but the manufacturing complexity increases
Solution Approach 1:
The collet is divided into multiple annular rings that can independently engage with different parts of the cartridge. This segmentation allows each ring to provide specific gripping functions, improving overall retention reliability while enabling modular manufacturing that may simplify production compared to a monolithic complex structure.
Solution Approach 2:
The multiple annular rings are nested within each other, with progressively smaller inner diameters. This nesting arrangement allows compact integration of multiple gripping elements within a limited space, improving cartridge security without proportionally increasing the overall complexity or difficulty of manufacture.
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 easy and secure refilling with any ink cartridge by ensuring a snug fit through adjustable dimensions, eliminating the need for specific cartridge matching and providing a universal solution for ink replenishment.
Implementation Method 1
a tip of the collet is configured to compressively engage around an outer diameter of a forward end of the cartridge
Implementation Method 2
rotation of the adjustment cylinder selectively extends and retracts a longitudinal length of the interior of the pen body to adapt to a length of an ink cartridge refill received therein
Data Source
AI summary
A refill friendly pen body that is configured to adapt to a refill cartridge of various dimensional parameters. An adjustment cylinder is adjustably carried within a barrel to adapt the pen body to a length of the refill cartridge. A grip end of the pen body is configured with an internal collet to compressively engage with a forward end of the cartridge across to retain the forward end of the cartridge in a writing position. The pen body may also be provided with a cap to selectively cover and uncover the writing tip.