Hall Joystick Side-Cap Sensor Layout for Compact Drift-Free Sensing
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Solution Overview
Problem
Conventional joysticks suffer from large product size due to protruding electronic components, complex structure, low production efficiency, short service life, drift issues, and high failure rates, particularly in resistive film and Hall sensor technologies.
Innovation Solution
A Hall joystick design with integrated Hall elements in side caps, a return spring, and a transmission member that allows for non-contact position detection, featuring a simple structure, high precision, and low power consumption, with Hall elements arranged within the side caps for rapid assembly and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If electronic components are mounted on the housing outside the frame, then the joystick can be assembled, but the product size becomes large and integration is hindered
Solution Approach 1:
The patent merges the electronic components with the frame structure by integrating the Hall sensor directly into the frame body. The sensor is positioned within the frame to detect the position of the rotating member, eliminating the need for separate housing-mounted electronic components and achieving a more compact, integrated design.
Solution Approach 2:
The patent implements nesting by placing the Hall sensor inside the frame structure, where the sensor is embedded within the frame body. This nested arrangement allows the electronic component to occupy space within the existing frame volume rather than adding external bulk, reducing overall product size while maintaining functionality.
2Reliability
If a resistive film structure with sliding rheostat is used, then the structure is simple and cost is low, but service life is short and precision is low
Solution Approach 1:
The patent replaces the mechanical sliding rheostat system with a magnetic field-based Hall sensor system. Instead of using a carbon brush that physically slides on a resistive film, the invention uses a Hall sensor to detect the position of a rotating member with magnets, eliminating mechanical contact and wear while improving precision and service life.
Solution Approach 2:
The patent changes the detection parameter from electrical contact resistance (in sliding rheostats) to magnetic field strength (in Hall sensors). This parameter change enables non-contact detection, which eliminates the wear and drift problems inherent in mechanical sliding contacts while providing more precise position detection.
3Measurement precision
If multiple Hall devices are used to calculate positions on X and Y axes, then position detection is achieved, but failure rate is high and cost is high
Solution Approach 1:
The patent extracts only the essential detection function needed for the application. Instead of using multiple Hall devices for redundant or comprehensive detection, the invention uses a single Hall sensor positioned to detect the rotation angle of the rotating member, which is then used to determine position on both X and Y axes through calculation, reducing component count and failure points.
Solution Approach 2:
The patent makes the single Hall sensor perform multiple functions: it detects the rotation angle of the rotating member, which then provides position information for both the X-axis and Y-axis movements of the joystick. This multi-functional approach eliminates the need for separate sensors for each axis, reducing the overall failure rate while maintaining detection precision.
4Productivity
If many parts are used in the joystick structure, then the joystick can be assembled, but production efficiency is low
Solution Approach 1:
The patent combines multiple functional components into integrated assemblies. The Hall sensor is integrated into the frame structure, and the detecting member is integrated with the rotating member. This merging reduces the number of separate parts that need to be handled and assembled, thereby improving production efficiency.
Solution Approach 2:
The patent segments the joystick into functional modules: the frame assembly (containing the Hall sensor), the rotating member assembly (containing the detecting member and magnets), and the output shaft assembly. This modular segmentation allows for more efficient assembly processes where modules can be pre-assembled and tested separately before final integration, improving overall production efficiency.
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
Enables compact design, long service life, high precision, and reduced drift, while facilitating easy assembly and reducing production costs.
Implementation Method 1
a Hall element is arranged within the side cap; the Hall element is to detect the position of the rotating member
Data Source
AI summary
A Hall joystick includes: a main body having a first side surface and a second side surface; a first side cap and a second cap that are respectively fixed to the first side surface and the second side surface; a first rotating member and a second rotating member that are rotatably connected to the first side cap and the second side cap, each of the first rotating member and the second rotating member having a magnet; a stick partly received in the main body and having a lower end rotatably connected to the main body; a transmission member movably arranged in the main body and configured to transmit a rotational motion from the stick to the first rotating member and the second rotating member; and a first Hall element arranged within the first side cap, and a second Hall element arranged within the second side cap.