Mirror Device Cylindrical Support Elastic Deformation
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Solution Overview
Problem
Conventional mirror devices face challenges in appropriately holding the rotation shaft, leading to potential displacement and vibration issues that degrade the quality of the display image in head-up display systems.
Innovation Solution
A mirror device design featuring a cylindrical support portion with a tapered shape and C-shaped cross-section, which slidably supports the rotation shaft by spreading outward in the radial direction, providing secure alignment and reducing displacement and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional support structure is used for the rotation shaft, then the structure is simple, but the rotation shaft experiences displacement and vibration causing image quality degradation
Solution Approach 1:
The support portion is designed with elastic deformation capability, allowing it to dynamically adapt to the rotation shaft while maintaining stable support. The elastic material enables the support portion to flexibly accommodate rotational movements while preventing displacement and vibration, thus improving reliability without significantly increasing complexity.
Solution Approach 2:
The support portion changes its physical state from rigid to elastic, utilizing elastic deformation to achieve stable support of the rotation shaft. This parameter change allows the support structure to absorb vibrations and prevent displacement while maintaining a relatively simple overall design.
2Measurement precision
If the support portion is made rigid to prevent rotation shaft displacement, then positioning accuracy improves, but vibration damping capability deteriorates
Solution Approach 1:
The support portion utilizes elastic deformation as its working principle, changing from a rigid state to an elastic state. This allows it to maintain precise positioning of the rotation shaft while simultaneously damping vibrations through controlled elastic flexing, thus resolving the contradiction between positioning accuracy and vibration resistance.
Solution Approach 2:
The elastic support portion acts as a pre-configured cushioning element that absorbs and dampens vibrations before they can cause significant displacement or affect image quality. The elastic material is selected and designed to provide inherent vibration damping while maintaining positioning accuracy.
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
The solution effectively suppresses displacement and vibration of the rotation shaft, enhancing the stability and accuracy of the mirror's rotational position, thereby improving the quality and clarity of the displayed image.
Implementation Method 1
the rotation shaft is inserted into the support portion while spreading the support portion outward in a radial direction, and is slidably supported by the support portion
Data Source
AI summary
A mirror device includes: a mirror having a rotation shaft and a reflecting surface that reflects display light; a support portion having a cylindrical shape, having a base end fixed and a tip end being a free end, and configured to rotatably support the rotation shaft; and a motor that pivots the mirror, in which the rotation shaft is inserted into the support portion while spreading the support portion outward in a radial direction, and is slidably supported by the support portion.