Detachable Pen Tip Unit for Electromagnetic Coupling Electronic Pens
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic pens of the electromagnetic coupling type require replacement of the entire module when the coil becomes defective, leading to economic burden and limited customization options for pen tip structure and feel.
Innovation Solution
The electronic pen features a detachable pen tip unit that houses the coil, allowing for replacement of only the pen tip unit, enabling various pen tip structures and shapes, and incorporating a writing pressure detector for improved feel and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coil is configured as a module unitized with the writing pressure detector and circuit portion, then the electromagnetic coupling function is ensured, but the entire module must be replaced when the coil becomes defective, increasing user cost and reducing repairability
Solution Approach 1:
The electronic pen is divided into two separable modules: the pen tip unit containing the coil and magnetic core, and the main body containing the writing pressure detector and circuit portion. This segmentation allows the coil to be replaced independently without replacing the entire module, resolving the contradiction between ensuring electromagnetic coupling reliability and enabling easy repair.
2Shape
If the pen tip casing thickness is reduced to improve visibility, then the aesthetic appearance is enhanced, but the magnetic core becomes thinner and more susceptible to damage from drops
Solution Approach 1:
By separating the coil assembly into an independent pen tip unit, the design allows optimization of pen tip thickness for aesthetic purposes without compromising the structural integrity of the magnetic core. The magnetic core remains housed in its own protective casing that can be designed independently for durability.
3Volume of moving object
If the magnetic core is made thinner to enable miniaturization of the electronic pen, then the pen size is reduced for better portability, but the coil becomes more vulnerable to damage from accidental drops
Solution Approach 1:
The separation of the coil into an independent pen tip unit allows the magnetic core to be miniaturized for portability while the unitized structure provides protective housing. When damage occurs, the entire pen tip unit can be replaced as a module, mitigating the vulnerability of the thin magnetic core.
4Reliability
If the entire module is replaced when the coil becomes defective, then the electromagnetic coupling function is restored, but the user bears economic burden and loses customization options for pen tip structure
Solution Approach 1:
The pen tip unit is designed as a separate replaceable module containing the coil and magnetic core. This segmentation enables users to replace only the pen tip unit when needed, reducing costs and allowing customization with different pen tip structures while maintaining the electromagnetic coupling function.
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 user costs by allowing only the pen tip unit to be replaced, provides customizable pen tip structures and shapes, and enhances the writing experience with adjustable resonance frequency options.
Implementation Method 1
The electronic pen of the electromagnetic coupling type indicates the position to a position detection sensor by performing signal interaction between the resonant circuit and the position detection sensor through electromagnetic coupling
Implementation Method 2
The resonant frequency of the resonant circuit of the electronic pen is adjusted so as to correspond to the frequency of the signal exchanged between the electronic pen and the position detection sensor
Data Source
AI summary
An electronic pen of an electromagnetic coupling type has a resonant circuit that includes a coil and that is configured to indicate a position to a position detection sensor through electromagnetic coupling between the resonant circuit and the position detection sensor. The electronic pen includes an electronic pen main body and a pen tip unit configured to be detachable from the electronic pen main body. The pen tip unit includes a pen tip casing in which at least the coil is housed. The electronic pen main body includes a circuit portion of the resonant circuit that is electrically coupled to the coil housed in the pen tip unit when the pen tip unit is attached to the electronic pen main body.