Operation Support Device Initialization via Conductive Segmentation
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Solution Overview
Problem
Existing operation support devices for electrostatic-capacitance-type coordinate input devices fail to detect the rotation angle of an operation knob during the initialization process, as the position of the contact part is unknown, requiring the knob to be installed after initialization.
Innovation Solution
An operation support device with a conductive first shaft part and end part that come into contact with a conductive operation member, allowing for the detection of changes in electrostatic capacitance and enabling the initialization process while the device is mounted, using a combination of magnets and conductive materials for tactile feedback and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the operation support device is mounted on the coordinate input device before initialization, then the device can be initialized with the knob installed, but the rotation angle cannot be detected because the contact part position is unknown
Solution Approach 1:
The operation support device is divided into multiple conductive components (first shaft part, first end part, second shaft part, second end part) that can be independently positioned and controlled. This segmentation allows the contact parts to be strategically placed to provide detectable signals during initialization while maintaining rotation detection capability.
Solution Approach 2:
The device utilizes changes in electrostatic capacitance parameters to detect both the initialization state and rotation angle. By monitoring capacitance variations between different conductive parts and the touch panel, the system can distinguish between initialization contact and rotational movement.
2Productivity
If the contact part of the operation knob is used as a reference value during initialization, then the initialization process can proceed, but the position of the contact part becomes unknown and rotation angle detection fails
Solution Approach 1:
Multiple conductive parts serve as intermediaries between the operation knob and the touch panel. These intermediate contact points provide reference signals during initialization without consuming the primary contact part's position information, enabling both initialization and subsequent rotation detection.
Solution Approach 2:
The conductive parts are pre-positioned on the operation knob at specific locations (shaft part and end part) before initialization. This preliminary arrangement ensures that during the initialization process, these pre-placed contact points provide the necessary reference signals while preserving the ability to detect rotation angles afterward.
3Device complexity
If a simple conductive contact structure is used, then the device complexity is reduced, but the ability to distinguish pressing states and detect rotation angles is insufficient
Solution Approach 1:
The contact structure is segmented into multiple conductive components (shaft parts and end parts) rather than using a single contact point. This segmentation provides multiple independent detection points that can distinguish between pressing states and rotational movements while maintaining relatively simple individual component designs.
Solution Approach 2:
The detection system transitions from detecting only contact presence to detecting spatial relationships between multiple conductive parts. By monitoring the relative positions and capacitance interactions of the shaft parts and end parts in different dimensions, the system can reliably distinguish pressing states from rotation without significantly increasing individual component complexity.
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 the detection of rotation angles and initialization of the coordinate input device with the operation support device installed, providing accurate coordinate input and preventing erroneous operations by distinguishing between pressing and non-pressing states.
Implementation Method 1
an operation support device that supports an input operation to a coordinate input device for detecting a change in electrostatic capacitance
Implementation Method 2
a first magnet 8 and a second magnet 9
Data Source
AI summary
An operation support device that supports an input operation to a coordinate input device for detecting a change in electrostatic capacitance, the operation support device, comprises: an operation member; a first rotation plate that moves in a vertical direction in conjunction with the operation member; and a first member that includes a conductive first shaft part that protrudes from the first rotation plate toward the coordinate input device, and a conductive first end part. In conjunction with a pressing operation performed on the operation member to a first stage, the first shaft part and the first end part come into contact with each other.