Magnetic Joystick Layout for Precise Multi-Directional Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multi-directional input devices are relatively insensitive and untimely in judging the orientation and movement amount, affecting user experience due to inaccurate magnetic field variation sensing.
Innovation Solution
The multi-directional input device features a housing with a rocker portion and a magnetic member aligned vertically, allowing the magnetic member to move relative to a magnetic induction chip along any axis, enhancing accuracy and timeliness of direction and movement detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the centers of components (reset tilting mechanism, stick, magnetic member, magnetic induction chip) are not aligned on the same vertical line, then the device structure is simpler to manufacture, but the magnetic induction chip cannot accurately and timely sense the magnetic field variation
Solution Approach 1:
The patent applies asymmetry by deliberately designing the magnetic member and magnetic induction chip to be positioned asymmetrically relative to the stick's center line. The magnetic member is offset from the stick's center, and the magnetic induction chip is positioned to detect the magnetic field at this asymmetric location, which improves sensing accuracy while maintaining structural simplicity
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the stick's mechanical movement and the electronic sensing system. The magnetic member generates a magnetic field that varies with stick position, and the magnetic induction chip detects this intermediary field to determine stick orientation, enabling accurate sensing without direct mechanical contact or complex alignment
2Loss of time
If the magnetic member is positioned away from the stick center, then the reset mechanism can be integrated, but the magnetic induction chip cannot timely sense the magnetic field variation
Solution Approach 1:
The patent merges the reset mechanism with the magnetic sensing system by positioning the magnetic member such that it serves both the reset function (through magnetic attraction to the magnetic induction chip) and the sensing function simultaneously. This integration eliminates separate reset components and reduces response time
Solution Approach 2:
The magnetic field interaction provides continuous sensing and resetting action. As the stick moves, the magnetic field continuously varies, providing real-time feedback for both position detection and automatic resetting, ensuring timely response without interruption or delay
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 accurately and timely feedbacks the direction and amount of movement of the operation stick, improving user experience by ensuring precise control and responsiveness.
Implementation Method 1
By tilting the stick to drive the magnetic member to move, the magnetic induction chip can obtain the direction and displacement of the stick's movement by sensing the magnetic field variation
Implementation Method 2
the spring elastically deforms to drive the operation stick reset to a middle position
Implementation Method 3
the elastic sheet elastically deforms to have a hand feeling feedback of pressing the operation stick
Data Source
AI summary
A multi-directional input device includes a housing, an operation stick, a magnetic member, a printed circuit board, a supporting seat, a reset assembly, an elastic sheet, a pressing member and a magnetic induction chip. The operation stick includes an operation portion and a rocker portion connected to the operation portion. The reset assembly includes a pressing plate and a spring. The magnetic induction chip includes a chip and an induction part. Centers of the rocker portion, the magnetic member, the pressing member, the elastic sheet and the induction part are located at a same vertical line. In response to the operation stick being tilted or vertically pressed, the magnetic member is driven to move relative to the induction part in any one direction, and the induction part detects magnetic field variation of the magnetic member and outputs magnetic field variation signal.