Wireless Keyboard Magnet-Coil Power Generation From Key Presses
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Solution Overview
Problem
Existing self-powered wireless keyboards face limitations such as requiring extra active work for energy generation, low mechanical energy utilization efficiency, and weak power generation, which restrict their functionality and user experience.
Innovation Solution
A self-powered wireless keyboard design incorporating a permanent magnet core, induction coil, and power management module, combined with solar cells, to efficiently generate and manage power from both mechanical key presses and environmental light energy, without significant modification to the original keyboard structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If piezoelectric effect is used to generate electricity by pressing keys, then mechanical energy can be transformed into electrical energy, but the energy utilization efficiency is very low because the deformation utilized is far less than the key stroke range
Solution Approach 1:
The patent replaces the piezoelectric effect (mechanical-to-electrical conversion) with electromagnetic induction. Instead of relying on material deformation, the system uses a magnet moving through a coil during key press to generate electricity, which more efficiently captures the mechanical energy from the full key stroke range.
Solution Approach 2:
The patent changes the physical parameters of the power generation system by using a magnet-coil configuration where the magnet moves through the coil during key press. This allows the full key stroke range (2.50-4.50 mm) to be utilized for generating induced current, significantly improving energy capture compared to piezoelectric deformation limits.
2Use of energy by moving object
If a hand rocker is used for power generation, then electricity can be generated by active human work, but extra work is required and it is inconvenient to use
Solution Approach 1:
The patent makes the keyboard self-powered by capturing energy from its normal usage (key presses) and environmental light through solar cells. The system automatically generates and stores electricity without requiring any additional user actions beyond normal typing, eliminating the need for separate charging operations.
Solution Approach 2:
The patent combines two power generation methods (mechanical energy from key presses and solar energy from light) into a single unified power system. This multi-functional approach ensures the keyboard can generate power through either or both mechanisms depending on usage conditions, improving convenience while maintaining power generation capability.
3Power
If mechanical energy generation is implemented with traditional key design, then power can be generated, but the power generation efficiency is very low and cannot meet the demands for normal use
Solution Approach 1:
The patent introduces a dynamic magnet-coil interaction where the magnet is positioned to move through the coil during key press. This dynamic configuration optimizes the magnetic flux change and induced current generation, significantly improving power output and generation efficiency compared to static traditional designs.
Solution Approach 2:
The patent merges mechanical energy capture (through the magnet-coil system activated by key presses) with solar energy capture (through solar cells on the keyboard surface) into a unified power generation system. This combination ensures sufficient total power output to meet normal usage demands while maintaining high efficiency through optimized energy capture mechanisms.
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 design enhances power generation efficiency, extends battery life, and maintains user convenience by leveraging both mechanical and solar energy, ensuring continuous operation with reduced internal losses and additional workload.
Implementation Method 1
The permanent magnet core is arranged inside a protrusion block on the lower surface of the key, and the induction coil is wound around within the key slot under the keyboard. The power management module can receive the induced current generated by the induction coil
Implementation Method 2
the upper surface of the key is covered by solar cell film, and the current produced is sent to the power management module
Data Source
AI summary
A self-powered wireless keyboard by modifying the structure of a traditional membrane keyboard having a volcanic crater structure. Not damaging the original membrane keyboard structure, a micro magnet core is installed inside a cylindrical protrusion block under the key cap as a mover of the induction power generation device, and an induction coil is wound in a key slot of the keyboard base as the stator of the induction power generation device. In this way, when each key is pressed, it will produce induction current. A layer of flexible solar cell can be laid on the upper surface of the key, which can generate electricity by collecting the light energy in the surrounding environment during the time of daily illumination.