Multi-Way Input Structure for Accurate Tilt Load Detection
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Solution Overview
Problem
Existing multi-way input devices, such as analog stick controllers, lack an effective method for accurately detecting loads applied in multiple directions, limiting their operational range and accuracy.
Innovation Solution
The multi-way input device incorporates a strain-generating element with detection arms and a load detector, which includes strain detection elements on a flexible printed circuit. This configuration allows for the detection of strain generated in multiple directions, enabling accurate output of load magnitude and direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional analog stick controller structure is used, then device simplicity is maintained, but load detection accuracy in multiple directions is insufficient
Solution Approach 1:
The strain-generating element is divided into multiple detection arms (first detection arm, second detection arm, third detection arm, fourth detection arm) that extend in different directions from a central base portion. Each detection arm independently detects strain in its specific direction, enabling multi-directional load detection with high accuracy while maintaining a relatively simple overall structure.
Solution Approach 2:
Different regions of the strain-generating element are designed with different functions: the base portion serves as the central support structure, the detection arms are optimized for strain detection in specific directions, and the locking arms provide structural support and engagement features. This local differentiation allows each component to be optimized for its specific function, improving overall measurement precision.
2Measurement precision
If detection arms are made to contact the tilt operation unit for direct strain transfer, then strain detection sensitivity is improved, but the structural integrity and stability are compromised
Solution Approach 1:
The locking arms serve as intermediary elements between the tilt operation unit and the detection arms. The upper surfaces of the locking arms contact the lower surface of the tilt operation unit to receive and transfer loads, while the detection arms detect strain generated in the locking arms and base portion. This intermediary structure allows indirect strain transfer that maintains both detection sensitivity and structural stability.
Solution Approach 2:
The strain detection mechanism transitions from direct contact in the vertical dimension to indirect detection through the structural dimension. The detection arms detect strain in the locking arms and base portion, which are themselves subjected to load from the tilt operation unit. This dimensional transition allows the detection arms to remain non-contacting while still achieving accurate strain detection.
3Strength
If locking arms are positioned to contact the tilt operation unit, then structural support is improved, but detection arm accessibility for strain detection is reduced
Solution Approach 1:
The strain-generating element is segmented into distinct functional zones: locking arms for structural support and load reception, detection arms for strain detection, and a base portion that transmits strain from the locking arms to the detection arms. This segmentation allows the locking arms to contact the tilt operation unit for structural support while the detection arms remain positioned to detect the resulting strain in the base portion.
Solution Approach 2:
The locking arms and detection arms are merged into a single integrated strain-generating element made of flexible material. This integration allows the locking arms to provide structural support while simultaneously allowing strain to be transmitted through the base portion to the detection arms, combining structural and sensing functions in one component.
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 solution enhances the device's ability to detect loads with high accuracy, expanding its operational range beyond the limitations of traditional analog stick controllers, and allowing for more precise multi-way input operations.
Implementation Method 1
multiple strain detection elements provided for the strain-generating element... each of the strain detection elements detects strain generated in a corresponding detection arm when load is applied to the tilt operation unit
Data Source
AI summary
A multi-way input device includes a strain-generating element, strain detection elements, and a tilt operation unit including an operation shaft configured to tilt. The strain-generating element includes a base portion, detection arms extending in respective directions from the base portion, support legs, and locking arms each of which is provided to extend from the base portion, each of the locking arms having an upper surface and being situated between adjacent detection arms among the detection arms. The upper surface of each of the locking arms contacts a lower surface of the tilt operation unit, and each of the detection arms does not contact the lower surface of the tilt operation unit.