Pointing Input Mechanism for Accurate Tilt and Rotation Detection
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Solution Overview
Problem
Conventional pointing devices face challenges in achieving high accuracy for tilt and rotation operations due to their complex structures, which are difficult to realize without intricate mechanisms.
Innovation Solution
A pointing device design featuring a tiltable operation member with protrusions that interact with a rotation member, allowing for precise tilt and rotation operations without a complicated structure, utilizing a substrate, operation member, rotation member, and housing member that work together to prevent erroneous detection of rotation during tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional pointing device structure is used to enable tilt and rotation operations, then the device can perform basic operations, but the structure becomes complicated and measurement precision deteriorates
Solution Approach 1:
The patent combines the tilt detection and rotation detection functions into a single integrated operation member structure. The operation member includes both the tilt operation portion and the rotation operation portion as unified components, eliminating the need for separate mechanical structures for each function. This merging approach maintains full operational capability while significantly simplifying the overall device structure.
Solution Approach 2:
The operation member is designed as a multi-functional component that can perform both tilt operations and rotation operations. The single operation member includes a tilt operation portion for detecting tilt in two axial directions and a rotation operation portion for detecting rotation around the vertical axis, allowing one component to fulfill multiple operational roles that would traditionally require separate mechanisms.
2Adaptability or versatility
If a conventional pointing device structure is used to enable tilt and rotation operations, then the device can perform basic operations, but the structure becomes complicated and manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by providing detection units with different detection ranges tailored to their specific functions. The tilt detection units are configured with detection ranges that correspond to the tilt operation portion's movement, while the rotation detection units are configured for the rotation operation portion's movement. This localized optimization of detection ranges ensures high manufacturing precision and detection accuracy without requiring the entire system to meet uniformly high precision standards.
3Measurement precision
If the rotation member is positioned to detect rotation, then rotation detection is enabled, but tilt operations may erroneously trigger rotation detection
Solution Approach 1:
The patent segments the operation member into distinct functional portions: a tilt operation portion and a rotation operation portion. The rotation member is specifically positioned to interact only with the rotation operation portion, while tilt detection units are positioned to interact only with the tilt operation portion. This spatial segmentation ensures that tilt movements do not erroneously trigger rotation detection, as each detection system is isolated to its designated operational zone.
Solution Approach 2:
The patent introduces detection units as intermediary elements that mediate between the operation member's movements and the detection systems. The tilt detection units are positioned to detect only tilt operations, and the rotation detection units are positioned to detect only rotation operations. These intermediary detection units act as filters that prevent cross-contamination of detection signals, ensuring that tilt operations do not trigger rotation detection and vice versa.
Data Source
AI summary
A pointing device includes: a substrate; an operation member that is provided tiltably with respect to the substrate, and includes a protrusion protruded from one of an inner wall and an outer wall; and a rotation member that is provided rotatably on the substrate, and includes a hole which the protrusion enters when the rotation member overlaps the operation member; wherein the rotation member rotates in conjunction with the operation member when the protrusion contacts an edge of the hole according to rotation of the operation member, wherein the hole is formed in a range in which the protrusion is movable by tilt of the operation member.