Shift Lever Light Guide and Sensor Integration for Stable Detection
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Solution Overview
Problem
Existing shift devices require separate components for emission and detection, leading to increased complexity and component count, which can result in inefficiencies and difficulties in maintaining consistent light guidance and detection.
Innovation Solution
Integration of an emission section and detection portion on a single mounting body, with a guide member that directs light and maintains a consistent number of emission portions opposing an incidence face, reducing component count and variations in light guidance and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the emission section and detection portion are provided separately, then the functional separation is clear, but the number of components increases and assembly complexity increases
Solution Approach 1:
The emission section and detection portion are integrated onto a single mounting body, reducing the number of separate components and simplifying assembly operations while maintaining functional distinction between light emission and detection
2Illumination intensity
If multiple emission portions are provided, then light coverage is improved, but variations in light incidence occur when the shift body moves
Solution Approach 1:
The arrangement of multiple emission portions is designed to dynamically maintain a constant number of opposing emission portions regardless of shift body position, ensuring consistent light incidence and guidance while providing adequate light coverage
3Device complexity
If the guide member and detection portion are integrated, then component count is reduced, but light leakage may increase
Solution Approach 1:
The detection portion is positioned to detect light from the side of the guide member rather than from the end, extracting the detection function from the light guidance path and preventing light leakage into the detection portion while maintaining component integration
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 integration reduces the number of components, maintains consistent light incidence and guidance, and separates light-guiding and detection functions, enhancing efficiency and ease of assembly while minimizing light leakage and variations.
Implementation Method 1
a guide member that is provided at the shift body and that guides light
Implementation Method 2
an emission section emitting light to the guide member
Data Source
AI summary
In a shift device, a magnetic sensor detects a rotational movement position of a lever. A lower light guide of the lever guides light from LEDs. The LEDs and the magnetic sensor are provided at a circuit board. Accordingly, a number of components may be reduced.