Mirror Holding Structure with Elastic Buffer for Distortion Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mirror distortion occurs due to adhesive shrinkage and thermal expansion/contraction differences between the mirror and its holder, leading to deformation and image distortion in projection systems.
Innovation Solution
A mirror holding structure with protrusion parts, reception parts, elastic parts, and an expansion tool that absorbs and attenuates stress, allowing for secure positioning and reduced transmission of stress to the mirror body, thereby minimizing distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the mirror and holder are fixed with adhesive, then the mirror is securely attached to the holder, but the mirror deforms due to adhesive shrinkage during curing
Solution Approach 1:
The patent introduces an elastic part as an intermediary element between the mirror and holder. This elastic part absorbs the shrinkage stress of the adhesive during curing, preventing direct transmission of stress to the mirror. The elastic material acts as a buffer that maintains attachment strength while protecting mirror flatness.
Solution Approach 2:
The patent changes the physical state and mechanical properties of the bonding interface by using an elastic part with specific elasticity parameters. This elastic component can deform to accommodate adhesive shrinkage, changing the stress distribution parameters at the bonding interface and preventing mirror deformation.
2Strength
If the mirror and holder are fixed with adhesive, then the mirror is securely attached to the holder, but the mirror deforms due to thermal expansion and contraction differences
Solution Approach 1:
The elastic part serves as a thermal buffer between the mirror and holder. When thermal expansion or contraction occurs, the elastic part absorbs the differential movement caused by different thermal expansion coefficients, preventing stress transmission that would deform the mirror while maintaining secure attachment.
Solution Approach 2:
The elastic part is pre-installed in the holder before the mirror is attached with adhesive. This beforehand cushioning prepares the bonding interface to absorb thermal stress, creating a stress-absorbing layer that protects the mirror from thermal deformation during temperature variations.
3Measurement precision
If the elastic part is tightly fitted in the holder, then positioning precision is improved, but stress is transmitted to the mirror causing distortion
Solution Approach 1:
The elastic part's material parameters (elasticity, hardness) are specifically selected to provide sufficient friction for positioning precision while allowing controlled deformation to absorb stress. The elastic modulus is tuned to balance between maintaining position and absorbing stress, preventing mirror distortion.
Solution Approach 2:
The elastic part has non-uniform properties with different hardness or elasticity in different regions. The contact surface with the holder has higher friction for positioning, while the bulk material maintains sufficient elasticity to absorb stress, creating local quality differences that simultaneously achieve positioning precision and stress absorption.
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 reduces mirror distortion by absorbing adhesive shrinkage, thermal expansion, and vibration, ensuring a stable image projection without blur or distortion.
Implementation Method 1
an elastic part located between an outer peripheral surface of the at least one protrusion part and an inner peripheral surface of the insertion hole and being elastic
Implementation Method 2
The expansion tool is configured to push the at least one elastic part by being rotated with a shaft along an insertion direction of the expansion tool as a center to form the expanded part
Data Source
AI summary
A mirror holding structure includes: a holder; at least one protrusion part provided to one of a mirror body and the holder; at least one reception part provided to the other of the mirror body and the holder and having an insertion hole in which the at least one protrusion part is to be inserted; and at least one elastic part located between an outer peripheral surface of the at least one protrusion part and an inner peripheral surface of the insertion hole and being elastic.