Light Shielding Blade Laminate for Camera Shutter Vibration
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Solution Overview
Problem
Current shutter blades for cameras face challenges in achieving high rigidity and heat resistance while minimizing weight and power consumption, leading to increased vibration and dust issues, especially in high-speed applications.
Innovation Solution
A light shielding blade is designed with a laminate structure featuring two metal base materials of specific rigidity and a resin layer with high elastic modulus, sandwiched between the metal base materials to absorb shear strain and reduce vibration, using a combination of materials like aluminum and epoxy-based adhesives with supramolecular inclusion bodies for enhanced mechanical strength and heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the shutter blade is made heavier to increase rigidity, then the rigidity is improved, but the power consumption increases
Solution Approach 1:
The shutter blade uses a composite structure with a resin layer sandwiched between two metal base materials. The metal base materials provide high rigidity (specific rigidity ≥20×10^6 Pa·m³/kg, specific bending rigidity ≥1.0 Pa¹/³·m³/kg) while the resin layer (elastic modulus ≥1 GPa, thickness ≤65 μm) reduces overall weight. This composite construction achieves high rigidity with reduced mass, thereby lowering power consumption while maintaining structural integrity.
2Use of energy by moving object
If the shutter blade is made lighter to reduce power consumption, then the power consumption is reduced, but the rigidity decreases causing increased vibration
Solution Approach 1:
The composite structure with metal base materials and resin layer achieves optimal balance between weight and rigidity. The metal base materials provide the necessary mechanical strength and rigidity, while the resin layer reduces weight. The specific requirements (metal specific rigidity ≥20×10^6 Pa·m³/kg, resin elastic modulus ≥1 GPa) ensure that even with reduced mass, the blade maintains sufficient rigidity to minimize vibration during high-speed operation.
3Weight of moving object
If the resin layer thickness is increased to reduce weight, then the weight is reduced, but the rigidity decreases
Solution Approach 1:
The patent specifies precise parameter ranges to optimize the balance between weight reduction and rigidity maintenance. The resin layer thickness is constrained to ≤65 μm, and the elastic modulus must be ≥1 GPa. These parameter specifications ensure that the resin layer provides sufficient weight reduction while maintaining the structural rigidity required for high-speed shutter operation without excessive vibration.
4Temperature
If a metal blade is used to ensure heat resistance, then the heat resistance is improved, but the weight increases
Solution Approach 1:
The composite structure with metal base materials provides the necessary heat resistance for prolonged light exposure, while the resin layer reduces overall weight. The metal base materials have sufficient thermal conductivity and heat resistance, while the thin resin layer (≤65 μm) minimizes thermal insulation effects. This construction achieves weight reduction while maintaining adequate heat resistance for camera applications.
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 vibration amplitude and enhances heat resistance, allowing for a lightweight, efficient shutter blade configuration that suppresses vibrations and maintains camera performance even at high speeds.
Implementation Method 1
the resin layer has an elastic modulus of 1 GPa or more and a thickness of 65 μm or less
Data Source
AI summary
A light shielding blade including a laminate in which a resin layer is sandwiched between two metal base materials, wherein the two metal base materials each have a specific rigidity of 20×106 [Pa·m3/kg] or more and a specific bending rigidity of 1.0 [Pa1/3·m3/kg] or more, and wherein the resin layer has an elastic modulus of 1 GPa or more and a thickness of 65 μm or less.