Electronic Pen Interaction Unit Segmentation for Ink Protection
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Solution Overview
Problem
Fountain pens are poorly compatible with electronic pens due to the sensitivity of electronic parts to water and metal, and the challenge of maintaining ease of writing in an inclined state, as the electronic parts interact with position detecting sensors.
Innovation Solution
The electronic pen design positions the interaction unit opposite the pen body with a pen core interposed between, protecting the electronic part from liquid ink and metal interference, allowing for effective detection of pen pressure and position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic part is disposed in the pen tip to interact with the position detecting sensor, then position detection function is achieved, but the electronic part becomes susceptible to liquid ink and metal interference
Solution Approach 1:
The electronic pen is divided into distinct functional regions: the interaction unit containing electronic parts is separated from the ink-containing pen body. This segmentation allows the electronic components to be protected from ink exposure while maintaining position detection capability through electromagnetic interaction across the boundary.
Solution Approach 2:
The pen core acts as an intermediary structure between the interaction unit and the pen body. It provides a physical barrier that prevents liquid ink from contacting the electronic parts while allowing electromagnetic fields to pass through for position detection. The pen core mediates between the conflicting requirements of ink storage and electronic component protection.
2Shape
If the pen body is formed of metal to match fountain pen characteristics, then aesthetic and structural properties are improved, but the electronic part becomes susceptible to metal interference
Solution Approach 1:
The pen body is segmented into a metal pen body for structural integrity and aesthetics, and a separate interaction unit housing for electronic components. This allows the metal pen body to maintain fountain pen characteristics while the electronic parts are protected from metal interference through spatial separation and shielding in the dedicated housing.
Solution Approach 2:
The pen core and interaction unit housing serve as intermediary barriers between the metal pen body and the electronic parts. These intermediate structures prevent direct contact between metal and electronic components, reducing electromagnetic interference while allowing the metal pen body to retain its structural and aesthetic functions.
3Reliability
If the electronic part is disposed in the pen tip, then position detection is enabled, but maintaining ease of writing in an inclined state becomes difficult
Solution Approach 1:
The interaction unit is positioned in a different spatial dimension relative to the pen tip - it is disposed on the side opposite the pen body rather than at the very tip. This dimensional offset allows the electronic components to be protected while maintaining their ability to detect position through electromagnetic interaction, and the pen core's magnetic properties help maintain writing characteristics in inclined states.
Solution Approach 2:
The pen core acts as a magnetic intermediary that extends the magnetic field from the interaction unit toward the tip area. This allows position detection to function effectively even when the electronic parts are not at the extreme tip, maintaining ease of writing in various orientations including inclined states.
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
This configuration reduces susceptibility to liquid ink and metal interference, enabling reliable pen pressure detection and position sensing, even when used in an inclined state.
Implementation Method 1
the electronic pen is provided with an electronic part (for example, a coil in the case of an electromagnetic induction system) that interacts with the position detecting sensor
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
Provided is an electronic pen main body unit of an electronic pen having a function of a fountain pen. The electronic pen main body unit includes an ink writing unit in which a cartridge housing liquid ink is fitted to a rear end portion of a pen core, and a pen body is disposed so as to be superposed on the pen core in a direction orthogonal to a coupling direction of the pen core and the cartridge, and an interaction unit having an electronic part for exchanging a signal with a tablet. The interaction unit is disposed on a side of the pen core opposite the pen body in the direction orthogonal to the coupling direction of the pen core and the cartridge in a state in which the interaction unit recedes to the cartridge side from a writing end of the pen body in the coupling direction of the pen core and the cartridge.