Magnetic Coil Touch Module Vibration Feedback
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Solution Overview
Problem
Conventional touchpads with elastic keys suffer from damage due to prolonged use and elastic fatigue, leading to abnormal vibration feedback and pressing signal generation.
Innovation Solution
A touch module utilizing magnetic coils and a magnet, where the coils sense the magnetic field to generate a vibrating effect, providing a durable and precise vibration feedback mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an elastic key is located under the touchpad to provide vibration feedback, then the touchpad can generate restoring vibration and pressing signals, but the elastic key is readily damaged after prolonged use due to elastic fatigue and structural friction
Solution Approach 1:
The patent replaces the mechanical elastic key system with an electromagnetic vibration generation system. The magnetic coil generates electromagnetic force to drive the magnetic piece, which in turn vibrates the touchpad. This substitution eliminates the elastic key and its associated fatigue and friction problems, significantly improving reliability and service life while maintaining vibration feedback functionality.
Solution Approach 2:
The patent introduces a magnetic piece as an intermediary component between the magnetic coil and the touchpad. The magnetic piece is magnetically coupled to the coil and mechanically coupled to the touchpad, transferring electromagnetic force to mechanical vibration. This intermediary enables the decoupling of the driving mechanism from the vibration output, allowing the elastic key to be eliminated while preserving the vibration feedback function.
2Power
If a single-layer magnetic coil is used, then the structure is simple, but the vibration strength and sensing precision are insufficient
Solution Approach 1:
The patent transitions from a single-layer coil structure to a multi-layer stacked coil structure. By adding the vertical dimension (stacking multiple layers), the system achieves stronger electromagnetic force and better magnetic field sensing without significantly increasing horizontal space requirements. This dimensional expansion resolves the contradiction between vibration strength and structural simplicity.
Solution Approach 2:
The patent implements a nested arrangement where multiple coil layers are stacked vertically with alternating winding directions. The coils are nested in space with precise alignment, allowing compact integration while maximizing electromagnetic output. This nested structure enables strong vibration generation within a confined space, balancing power output with structural complexity.
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 touch module offers a robust and precise vibration feedback that is less prone to damage, maintaining effective pressing signal generation over time without the drawbacks of elastic key degradation.
Implementation Method 1
When the magnetic coils sense a magnetic property (e.g., a magnetic field) of the magnet, the magnetic coils generate a vibrating effect
Implementation Method 2
The first sensing line, the second sensing line and the third sensing line sense a magnetic field of the magnet and generates a vibrating effect
Implementation Method 3
As the magnetic coils generate the vibrating effect, the touchpad is subjected to vibration, or the vibration is transmitted to the touchpad
Data Source
AI summary
A touch module includes a base plate, a magnet, a touchpad and a magnetic board. The magnetic board includes a first wiring layer, a second wiring layer and a third wiring layer. The magnet is installed on the base plate. The touchpad is located over the base plate. The magnet is covered by the touchpad. The magnetic board is arranged between the touchpad and the magnet. The first wiring layer, the second wiring layer and the third wiring layer are in parallel with each other and stacked on each other. The second wiring layer is arranged between the first wiring layer and the third wiring layer. The first wiring layer is connected with the second sensing line through the third wiring layer. The first sensing line, the second sensing line and the third sensing line sense a magnetic field of the magnet and generates a vibrating effect.