Electronic Pen Cartridge Capacitive Coupling for Dustproof Signaling
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Solution Overview
Problem
Existing electronic pens face issues with dust and moisture intrusion through gaps between the pen body and cartridge body, leading to potential damage of internal circuits.
Innovation Solution
Implementing capacitive coupling between inner and outer electrodes within the cartridge and pen body, using signal adjusters to transmit the on/off state of a side switch without physical terminals, ensuring dustproofing and waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals penetrate the cartridge body to provide electrical connection, then electrical connection between side switch and cartridge circuits is achieved, but gaps between terminals and cartridge body allow foreign matter intrusion
Solution Approach 1:
The patent replaces the mechanical terminal penetration system with a capacitive coupling system. Instead of using physical terminals that penetrate the cartridge body to establish electrical connections, the invention uses capacitive coupling through the cartridge body wall. This substitution eliminates the gaps between terminals and cartridge body that allow foreign matter intrusion, while still enabling electrical connection between the side switch and cartridge circuits.
Solution Approach 2:
The patent introduces an intermediary approach by using the cartridge body itself as a dielectric medium for capacitive coupling. The cartridge body acts as an intermediary that allows electrical field interaction without physical penetration. The capacitive coupling mechanism uses the insulating properties of the cartridge body material to transmit electrical signals while maintaining the sealed structure.
2Ease of operation
If terminals are used for electrical connection, then signal transmission is enabled, but the cartridge structure becomes vulnerable to dust and moisture
Solution Approach 1:
The patent replaces the mechanical terminal-based signal transmission system with a capacitive coupling system that maintains the sealed cartridge structure. This substitution preserves signal transmission capability while eliminating the vulnerability to dust and moisture that arises from terminal penetrations and associated gaps.
Solution Approach 2:
The patent utilizes the cartridge body as a thin film/dielectric layer that enables capacitive coupling. The cartridge body wall acts as a flexible barrier that allows electrical field penetration through capacitive coupling while maintaining the protective seal against dust and moisture.
3Reliability
If physical terminals are used to connect electrodes, then electrical connection is established, but the cartridge body is compromised for sealing
Solution Approach 1:
The patent replaces the mechanical terminal penetration system with capacitive coupling that does not compromise the cartridge body sealing. By using the dielectric properties of the cartridge body material for capacitive coupling, the sealing integrity is maintained while still achieving reliable electrical connection between components.
Solution Approach 2:
The patent uses the cartridge body material as an intermediary dielectric that enables electrical connection without physical penetration. This intermediary approach allows the cartridge body to maintain its sealing function while still facilitating the necessary electrical interactions through capacitive coupling.
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
Prevents dust and moisture ingress, maintaining the functionality and integrity of the electronic pen's internal components.
Implementation Method 1
The first inner electrode is coupled capacitively with a first outer electrode arranged inside of the pen body. The second inner electrode is coupled capacitively with a second outer electrode arranged inside of the pen body.
Implementation Method 2
A first signal adjuster is interposed between the first outer electrode and the second outer electrode, and the first signal adjuster, in operation, adjusts an amount of a signal flowing between the first outer electrode and the second outer electrode.
Data Source
AI summary
Provided is a cartridge used in an electronic pen and housed in a pen body configured as an enclosure of the electronic pen, the cartridge including a first inner electrode and a second inner electrode arranged on the inner surface of a cartridge body configured as an enclosure of the cartridge, a signal source configured to supply a signal to the first inner electrode, and a signal detector configured to detect a signal appearing on the second inner electrode, in which the first inner electrode is coupled capacitively with a first outer electrode arranged inside of the pen body, the second inner electrode is coupled capacitively with a second outer electrode arranged inside of the pen body, and, between the first outer electrode and the second outer electrode, a first signal adjuster is interposed so as to adjust the amount of the signal flowing therebetween.