Vehicle Switch Magnet Positioning via Actuator Protrusion
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Solution Overview
Problem
Conventional vehicle switches for controlling the stop lamp in motor vehicles face accuracy issues due to positional deviations between the magnet and detector, leading to variations in detection accuracy during assembly, which affect the reliable on/off control of the stop lamp.
Innovation Solution
A vehicle switch design that includes a casing, an actuator movable in a predetermined direction, a magnet fixed to the actuator, and a detector for magnetism detection, with a holder enabling the actuator to move and position the detector accurately, reducing positional deviations without specialized tools during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the magnet and detector are assembled separately without specialized positioning tools, then the assembly process is simplified and productivity is improved, but positional deviations between the magnet and detector increase, reducing measurement precision
Solution Approach 1:
The patent introduces a positioning protrusion on the actuator that serves as an intermediary element to precisely locate the magnet relative to the detector during assembly. This positioning feature acts as a mediator between the two components, ensuring accurate alignment without requiring specialized positioning tools or complex assembly procedures, thus resolving the contradiction between simplified assembly and precise positioning.
Solution Approach 2:
The positioning protrusion is pre-formed on the actuator during its manufacturing process, establishing the correct position relationship between the actuator and magnet before final assembly. This preliminary positioning action ensures that when the magnet and detector are assembled together, their relative positions are already predetermined and accurate, eliminating the need for complex positioning tools during assembly.
2Device complexity
If the actuator movement detection system uses a magnet and detector without precise positioning features, then the device complexity is reduced, but the reliability of stop lamp control deteriorates due to positional variations
Solution Approach 1:
The positioning protrusion on the actuator serves as a simple intermediary feature that ensures reliable positioning between the magnet and detector. This single structural element provides the necessary positioning function without adding complex mechanisms, maintaining device simplicity while ensuring reliable stop lamp control by eliminating positional variations between components.
3Measurement precision
If specialized positioning tools and devices are used during assembly to reduce positional deviations, then measurement precision and control reliability are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The positioning protrusion on the actuator serves as an built-in intermediary positioning feature that eliminates the need for specialized external positioning tools. This integrated positioning element provides accurate alignment between the magnet and detector during assembly through its geometric shape alone, achieving high positioning accuracy while maintaining simple assembly procedures and reducing manufacturing costs.
Solution Approach 2:
The actuator's positioning protrusion is designed to automatically perform the positioning function during assembly without requiring external positioning tools or devices. The geometric features of the protrusion and its receiving structure enable self-alignment and self-positioning of the magnet and detector, making the assembly process self-sufficient and eliminating the need for complex positioning equipment.
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 design enhances the accuracy of detecting the actuator's movement and improves the reliability of the stop lamp's on/off control by minimizing positional deviations between the magnet and detector, ensuring precise operation without the need for additional positioning devices.
Implementation Method 1
casing 32 is internally provided with magnet 3 and detector 6 in such manner as to be opposed to each other. Magnet 3 is disposed on the lower side surface of actuator 2. Detector 6 is formed of Hall Element and the like
Data Source
AI summary
A holder is disposed in the case. The holder is mounted with an actuator that moves in the predetermined direction and a wiring board having a detector. A positioning mechanism between relevant components for detecting the positions of components is provided such as a wiring board and a holder, the position of magnet in particular. In this way, the magnet and the detector opposing to each other are positioned. As a result, when a vehicle switch is assembled, the variation in position of the magnet and detector is reduced.