Magnetic Joystick Assembly Restoring Force and Position Sensing
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Solution Overview
Problem
Existing joystick assemblies are mechanically complex, prone to wear, and typically fixed to devices, lacking a restoring force mechanism and efficient position sensing capabilities.
Innovation Solution
A magnetic assembly with a joystick design that utilizes a movable magnet with north and south poles, coupled to an electronic circuit and magnetic field sensors, providing a restoring force and enabling position sensing through differential signal generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic field sensors are used for position sensing, then measurement precision is improved, but device complexity increases due to additional electronic components
Solution Approach 1:
The patent combines multiple magnetic field sensing elements into a single integrated magnetic assembly that detects position through the interaction between a first magnet attached to the shaft and a second magnet in the base. This merging approach achieves accurate position sensing while reducing the number of separate electronic components needed compared to traditional optical or mechanical sensing systems.
Solution Approach 2:
The patent replaces mechanical position sensing mechanisms (such as optical encoders or mechanical linkages) with a magnetic field-based sensing system. The magnetic interaction between the first and second magnets provides non-contact position detection, eliminating the need for complex mechanical or optical sensing components while maintaining measurement precision.
2Force
If mechanical components are used in joystick assemblies, then restoring force is provided, but reliability deteriorates due to mechanical wear
Solution Approach 1:
The patent replaces traditional mechanical restoring force mechanisms (such as springs or mechanical latches) with a magnetic restoring force generated by the interaction between the first magnet on the shaft and the second magnet in the base. This magnetic-based system provides the necessary restoring force without the mechanical wear associated with contact-based mechanisms, significantly improving reliability and durability.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the shaft and base, allowing force transmission without direct mechanical contact. The magnetic interaction serves as a mediator that provides restoring force while eliminating the wear and friction problems inherent in direct mechanical contact systems.
3Stability of the object's composition
If joysticks are fixed to devices, then stability is improved, but adaptability worsens due to limited reconfiguration options
Solution Approach 1:
The patent transitions from a fixed, static joystick mounting system to a dynamic, reconfigurable magnetic assembly. The magnetic connection between the first and second magnets allows the joystick to be easily attached and detached while maintaining stable operation when mounted, providing both stability during use and adaptability for reconfiguration or replacement.
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 assembly reduces mechanical components, enhances durability, and allows for versatile applications across consumer and industrial devices by providing accurate position sensing and a restoring force mechanism.
Implementation Method 1
a magnetic field sensor can include one magnet... The electronic circuit can be used in the magnetic assembly to provide one or more output signals representative of one or more angles associated with the magnets
Implementation Method 2
An attraction of the second magnet to the first magnet results in a restoring force upon the shaft
Data Source
AI summary
A joystick assembly for use with a device including a joystick surface and a first magnet having north and south magnetic poles includes a second magnet having north and south magnetic poles and a movable elongated shaft having first and second opposing ends arranged along a major axis of the shaft. The first end of the shaft is coupled to the second magnet such that movement of the shaft results in movement of the second magnet relative to the first magnet such that a line between centers of the north and south magnetic poles of the second magnet is movable relative to a line between the north and south magnetic poles of the first magnet. An attraction of the second magnet to the first magnet results in a restoring force upon the shaft, and the shaft and the second magnet are removable from the joystick surface.