Steering Column Switch Magnet Carriage for Compact Position Sensing
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Solution Overview
Problem
Existing steering column switches face challenges in compactness and system integration due to the complexity of magnetic sensor arrangements, which often compromise space requirements and robustness, especially when trying to accommodate multiple systems within limited installation space.
Innovation Solution
A magnetic switching system where the magnet is firmly connected to a linearly displaceable carriage that follows the pivoting movements of the shift lever, allowing for a compact and flexible arrangement that minimizes interference with other systems, with the option of a frame-like carriage and a deflection lever for enhanced positioning freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple magnetic sensors are arranged on a guide to detect detent positions, then the switching position can be detected, but the device complexity increases and the overall length increases
Solution Approach 1:
The guide is segmented into multiple detection zones, each with its own magnetic sensor. This allows the system to detect which segment the actuating lever is in, reducing the number of sensors needed while maintaining detection precision across the full range of positions.
Solution Approach 2:
The magnetic sensors are arranged along the length of the guide rather than being distributed in three-dimensional space around the actuating lever. This linear arrangement reduces the overall complexity and footprint of the switching system.
2Measurement precision
If magnetic sensors are located behind the detent curve, then the switching position can be detected, but the overall length of the steering column switch increases
Solution Approach 1:
The magnetic sensors are positioned along the guide in a linear arrangement that utilizes the existing space along the actuating lever's path, rather than extending the overall length of the switch assembly. This allows detection without increasing the stationary length.
3Volume of stationary object
If the trigger system and latching system are arranged with limited degrees of freedom, then space is saved, but the magnetic switching system must be located to the side as a compromise
Solution Approach 1:
The guide structure serves multiple functions: it guides the actuating lever, provides detent positions for latching, and positions the magnetic sensors for detection. This multi-functionality allows all systems to coexist in a compact arrangement without compromising robustness.
Solution Approach 2:
The magnetic switching system is integrated with the guide and actuating lever assembly rather than being positioned separately. The guide itself becomes part of the switching system, combining the triggering, latching, and detection functions into a unified structure.
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 enables a compact, robust, and flexible magnetic switching system that can be positioned without affecting other components, offering additional degrees of freedom in alignment and improved evaluation quality, while maintaining system functionality.
Implementation Method 1
at least one magnet and at least one magnetic sensor which can be positioned relative to one another by movements of the shift lever
Data Source
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AI summary
The invention relates to a steering column switch for a motor vehicle, comprising a switch lever (1), which can be pivoted in two directions that are perpendicular to each other; a switch piece (3) which is pivotally mounted about a first axis (4), wherein the switch lever (1) is pivotally mounted in the switch piece (3) about a second axis (5) arranged perpendicularly to the first axis (4), and the switch lever (1) has a spring-loaded latching sleeve (6) at one end piece (15), said latching sleeve being latchable into a latching cam (7) at different positions; and at least one magnet (8) and at least one magnet sensor (9) which can be positioned relative to each other by moving the switch lever (1). The at least one magnet (8) is rigidly connected to a slide (10) which is movably mounted on the switch piece (3) in a linear manner parallel to the first axis (4), and the at least one magnet (8) pivots together with the switch piece (3) when the switch piece is pivoted about the first axis (4) thereof.