Single-Axis Joystick With Hall Sensing to Reduce Mechanical Wear
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Solution Overview
Problem
Existing joysticks face mechanical degradation and design challenges due to the close proximity of electronic sensing to mechanically moving elements, leading to frequent failures.
Innovation Solution
A single-axis joystick design featuring a cylindrical puck with a sensor/effector pair, such as a magnet and Hall sensor, within a cylindrical void, where the puck rotates as the shaft moves, allowing for signal generation without direct mechanical contact, and a positioning mechanism to retain the puck in a desired position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electronic sensing is performed at close proximity to mechanically moving elements, then sensing accuracy is improved, but mechanical degradation increases
Solution Approach 1:
The patent introduces a magnetic field as an intermediary between the mechanical shaft and the electronic sensor. The shaft contains a magnet that generates a magnetic field, which is detected by the Hall effect sensor. This magnetic intermediary allows the sensor to be positioned close to the moving element for accurate sensing without direct mechanical contact, thus preventing mechanical degradation while maintaining sensing accuracy.
Solution Approach 2:
The patent replaces traditional mechanical contact-based sensing (such as potentiometers or encoders that require physical contact) with a non-contact Hall effect sensor that detects the magnetic field generated by the moving shaft. This substitution eliminates mechanical wear and degradation while preserving the ability to accurately sense shaft position and movement.
2Ease of operation
If mechanical components are used for joystick operation, then operator control is enabled, but mechanical failure increases
Solution Approach 1:
The patent replaces the traditional mechanical linkage system that connects the joystick shaft to the sensor with a magnetic field-based sensing system. The shaft retains its mechanical function for operator control, but the connection to the sensing system is achieved through a magnet and Hall effect sensor rather than mechanical contact, thereby maintaining ease of operation while reducing mechanical failure points.
Solution Approach 2:
The magnetic field serves as an intermediary that transmits information from the mechanically operated shaft to the electronic system without requiring mechanical contact. This allows the mechanical components to be minimized to only what is necessary for operator control, while the sensing function is performed by non-contact magnetic field detection, reducing overall mechanical failure risk.
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 reduces mechanical stress and enhances durability by decoupling mechanical and electronic components, improving the reliability and longevity of the joystick.
Implementation Method 1
the sensor/effector pair is a magnet and a Hall sensor
Data Source
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AI summary
A joystick with a first casing that has a piece of a sensor/effector pair. A second section is attached to the first casing, where at least one of the first and second casings form a void within the first and second casings. A puck with a cylindrical shape is disposed within the void, where the puck has a piece of the sensor/effector pair. A shaft is connected to the puck, with a distal end free to move, thereby rotating the puck. The shaft passes through a void between the first and second casings, and as the shaft is moved and the puck rotates, an interaction between the pieces of the sensor/effector pair produces a signal indicating a degree of movement of the shaft.