Magnetic Rail Cap Structure for Active Capacitive Pen Charging Ports
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Solution Overview
Problem
Existing capacitive pens suffer from exposed charging ports that are aesthetically unpleasing, prone to having caps lost, and provide a poor pulling feel.
Innovation Solution
An active capacitive pen with a magnetic rail cap design that incorporates a magnetic slide rail to cover the charging port, enhancing aesthetics and improving the operational feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate cap is used to cover the charging port, then the charging port is covered, but the cap can be easily lost and the pulling feel is poor
Solution Approach 1:
The cap is merged with the pen body through a magnetic connection mechanism. The magnet set in the pen holder attracts the cap, causing them to move together as a unified structure. This eliminates the problem of the cap being easily lost while maintaining the ability to cover the charging port effectively.
Solution Approach 2:
A magnetic field is introduced as an intermediary force between the cap and the pen body. The magnet set creates a magnetic attraction that serves as the connecting mechanism, providing both retention force and smooth movement without mechanical fasteners or separate attachment components.
2Object-affected harmful factors
If the charging port is simply covered, then the appearance issue is addressed, but the operating feel is poor
Solution Approach 1:
The magnetic connection allows the cap to dynamically interact with the pen body. As the user pulls the cap, the magnetic force gradually decreases, providing a smooth, progressive resistance that enhances the pulling feel. The cap can be easily removed when sufficient force is applied, while maintaining secure attachment during normal use.
Solution Approach 2:
The magnetic field serves as a mediator that provides controlled resistance during cap removal. This creates a satisfying operational feel with progressive resistance, unlike rigid mechanical connections that provide abrupt resistance or no resistance at all.
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
The magnetic rail cap effectively covers the charging port, addressing appearance issues and reducing cap loss while significantly enhancing the user experience.
Implementation Method 1
magnetic slide rail is adopted to greatly improve the operating feel
Implementation Method 2
there is induction coil on the said circuit board that is close to the main bracket
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An active capacitive pen with magnetic rail cap includes a penholder, with a pen tip at one end and a seat at the other end away from the pen tip. The penholder houses multiple brackets and auxiliary brackets. A circuit board is securely positioned in the middle segment of the bracket to align with the auxiliary bracket. One end of the circuit board connects to the charging seat, and the other end connects to the battery trough, which is affixed to the primary bracket. An induction coil is situated on the circuit board, adjacent to the main bracket, with a magnet trough in close proximity. The magnet trough accommodates a magnet set. A touch induction needle is positioned on the circuit board, and an induction part corresponds to the touch induction needle's location. A shielding layer surrounds both the main bracket and auxiliary bracket.