Multi-Directional Input Layout for Magnetic Interference Isolation
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Solution Overview
Problem
Conventional multi-directional input devices face interference issues when magnets are used for detection, particularly when the device is miniaturized, as first and second magnets can interfere with each other during tilting operations.
Innovation Solution
A multi-directional input device design featuring a first and second co-functioning member with orthogonal rotating axes, each with a slider that moves in a specific horizontal direction, and generates a physical field detectable by corresponding sensors, ensuring that one generating member is positioned further away from the other to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnets are used for detection in a miniaturized device, then detection precision is improved, but generating members interfere with each other
Solution Approach 1:
The patent positions the first generating member and second generating member at different radial distances from their respective rotating axes. Specifically, the first generating member is positioned farther from the first rotating axis than the first rotating axis is from the first slider, and similarly for the second generating member. This dimensional arrangement in the radial direction prevents magnetic field interference between the two generating members while maintaining accurate detection of tilting operations in a miniaturized device structure.
2Ease of manufacture
If slide contacts are used in resistance circuit, then manufacturing simplicity is improved, but wear particles are produced
Solution Approach 1:
The patent replaces the mechanical sliding contact system with a magnetic field-based detection system. Instead of using contacts that physically slide on a resistance circuit, the invention uses first and second generating members (magnets) that generate physical fields detected by sensors. This substitution eliminates mechanical wear and particle generation while maintaining the ability to detect the position and movement of sliders, thereby solving the problem of wear particles without significantly complicating the manufacturing process.
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 effectively prevents interference between the generating members, allowing for accurate detection of tilting operations without wear particles, maintaining device functionality even when miniaturized.
Implementation Method 1
a first generating member held in the first slider and configured to generate a first physical field targeted for detection
Implementation Method 2
a second generating member held in the second slider and configured to generate a second physical field targeted for detection
Data Source
AI summary
A multi-directional input device including: an operating member; a first co-functioning member with a first rotating axis; a second co-functioning member with a second rotating axis; a first slider moving in a first horizontal direction following rotation of the first co-functioning member; a second slider moving in a second horizontal direction following rotation of the second co-functioning member; a first generating member generating a first physical field; a second generating member generating a second physical field; a first detection part detecting movement of the first generating member by detecting the first physical field; and a second detection part detecting movement of the second generating member by detecting the second physical field, and, one from among the first and second generating members is positioned further away from the other one than is the rotating axis that rotates when the one generating member moves.