Compact Hall Joystick Structure for Precise Non-Contact Sensing
Find Innovative SolutionsGenerate Solutions
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 analog control joysticks using resistive films and multiple Hall devices.
Innovation Solution
A Hall joystick design with integrated Hall elements within the side caps, a return spring for automatic return, and a transmission member to rotate magnets, enabling non-contact position detection with high precision and simple structure, reducing component protrusion and complexity.
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 electrical components protrude from the whole resulting in large product size
Solution Approach 1:
The patent integrates the electronic components (Hall sensor, circuit board, magnets) directly into the frame structure, merging previously separate components (housing-mounted electronics and frame) into a unified integrated assembly. This eliminates the need for external housing mounting and reduces overall product size while maintaining manufacturability through modular sub-assemblies.
Solution Approach 2:
The patent employs nested arrangement where electronic components are positioned within the frame's internal cavity space. The circuit board is mounted on the inner surface of the frame, Hall sensors are embedded in the frame body, and magnets are placed in dedicated recesses, effectively nesting multiple components within the frame's volumetric space rather than mounting them externally.
2Productivity
If many parts are used in the joystick structure, then the joystick can be assembled, but the structure becomes complicated resulting in low production efficiency
Solution Approach 1:
The patent combines multiple separate components into integrated assemblies: the return spring is integrated with the stick assembly, the Hall sensors are embedded directly in the frame rather than being separate mounted components, and the circuit board is mounted on the frame's inner surface rather than requiring a separate housing layer. This reduces the total part count and simplifies the assembly structure.
Solution Approach 2:
The frame serves multiple functions simultaneously: it provides the structural housing, mounts the electronic components (circuit board, Hall sensors), provides magnetic shielding, and structures the internal cavity for component placement. This multi-functionality reduces the need for separate dedicated components for each function, simplifying the overall structure.
3Reliability
If metal or carbon brush slides directly on the resistive film to detect position, then the structure is simple, but the service life is short and drift occurs
Solution Approach 1:
The patent replaces the mechanical contact-based resistive film detection system (metal/carbon brush sliding on film) with a non-contact Hall effect sensing system. The Hall sensors detect the position of magnets on the stick through magnetic field changes without any physical contact, eliminating wear and drift issues while providing precise position detection.
4Measurement precision
If multiple Hall devices are used to calculate positions on X and Y axes, then position detection is achieved, but the failure rate is high and cost increases
Solution Approach 1:
The patent uses a single Hall sensor to detect the position of a magnet assembly that moves with the stick. The Hall sensor measures the magnetic field strength variations as the magnet assembly moves along the stick's rotation arc, providing position detection without requiring multiple Hall devices arranged in complex arrays, thus reducing failure rate and cost.
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 design achieves compact size, high precision, long service life, and low power consumption with simplified assembly, addressing the drawbacks of conventional joysticks.
Implementation Method 1
A Hall element is arranged within the side cap. The magnet is attached to the rotating member, and the Hall element is arranged under the magnet
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.