Optical Element Driving Mechanism Flexible Plastic Structure
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Solution Overview
Problem
Plastic materials used in optical element driving mechanisms face challenges such as smooth surfaces that hinder bonding, and the need for hardness to maintain strength, leading to particle generation during collisions which affects mechanism performance.
Innovation Solution
Incorporating a flexible plastic structure with varying hardness levels, formed through methods like double injection or chemical plating, on components to enhance bonding, reduce particle generation, and provide a buffer against mechanical interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If plastic materials with smooth surfaces are used to maintain basic strength, then component strength is maintained, but bonding becomes difficult
Solution Approach 1:
The patent applies different surface treatments to different regions of the plastic component. The bonding surfaces are treated to create roughness for improved adhesion, while other regions maintain their original smooth surfaces to preserve strength and reduce particle generation. This local differentiation resolves the contradiction between bonding ease and component strength.
2Strength
If hard plastic materials are used to maintain component strength, then basic strength is maintained, but particle generation increases during collisions
Solution Approach 1:
The patent creates regions with different hardness levels within the plastic component. Contact surfaces and collision-prone areas are treated to have lower hardness and higher elasticity, reducing particle generation during impact. Core structural regions maintain higher hardness to ensure overall component strength. This spatial differentiation of material properties resolves the contradiction between strength and particle generation.
Solution Approach 2:
The patent creates a composite structure within the plastic component by combining hard and soft regions. The hard regions provide structural strength while the soft regions provide impact absorption and particle reduction. This composite approach allows the component to simultaneously achieve both strength and low particle generation.
3Object-generated harmful factors
If flexible plastic structures are added to reduce particle generation, then particle generation is reduced, but device complexity increases
Solution Approach 1:
The patent integrates the flexible plastic structure directly into the existing plastic component through co-molding or overmolding processes. The soft and hard regions are formed as a single integrated part rather than separate components, eliminating the need for additional assembly steps and reducing overall device complexity while still achieving particle generation reduction.
Solution Approach 2:
The patent changes the material parameters (hardness, elasticity) of specific regions within the existing plastic component structure. By adjusting material composition and processing parameters during manufacturing, the flexible regions are created without adding complex structural elements, thus reducing particle generation while maintaining simple device architecture.
Data Source
AI summary
An optical element driving mechanism is provided, including a first component, a second component, an optical element driving assembly, and a flexible plastic structure. The second component is disposed corresponding to the first component. The first component has a first surface facing the second component. The optical element driving assembly is configured to force the optical element to move. The flexible plastic structure is formed on the first surface of the first component, and the hardness of the first component is greater than that of the flexible plastic structure.