Integrated Shift Interface for Fewer Components and Precise Range Change
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Solution Overview
Problem
Existing shift devices require multiple push buttons and springs for each shift position, leading to a high number of components and complexity.
Innovation Solution
A shift device with an operation body featuring multiple shift positions on a single surface, utilizing a detection portion to sense touch and pressing operations, and a restriction mechanism to control range changes, reducing the need for individual components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple push buttons with individual springs are provided for each shift position, then each shift position can be independently operated, but the number of components increases and device complexity increases
Solution Approach 1:
Multiple push buttons are merged into a single operation body with multiple shift positions. The detection portion integrates multiple detection functions into one component, and a single spring provides elastic force for all positions, replacing the need for multiple individual springs and buttons.
Solution Approach 2:
The operation body serves multiple functions: it provides the structural housing, contains all shift positions, and works with the single spring to provide elastic force for all positions. The detection portion detects both touch operations on individual positions and pressing operations on the entire operation body.
2Device complexity
If a single operation body with multiple shift positions is used, then the number of components is reduced, but the detection of touch and pressing operations becomes more complex
Solution Approach 1:
The detection portion dynamically distinguishes between different operation types by monitoring the sequence and pattern of detections. It first detects touch operations on specific shift positions, then detects subsequent pressing operations on the operation body as a whole, using temporal and spatial differentiation to identify different user intentions.
Solution Approach 2:
The detection portion provides feedback by monitoring the operational state and using this information to determine the type of operation being performed. The system uses the detection results to control the shift range changes, ensuring that only authorized operations result in transmission range changes.
Data Source
AI summary
In a shift device, a P position, an R position, an N position, and a D position are set on a housing, and when an electrostatic sheet detects a touch operation on the P position, the R position, the N position, or the D position and a photosensor detects a pressing operation on the housing, a shift range of a transmission is changed. Therefore, the number of components can be reduced.