OIS Suspension Spring Wire Structure for Heavier Lens Reliability
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Solution Overview
Problem
Conventional optical image stabilization components using cylindrical metal suspension wires or elastic sheets have poor reliability and are unsuitable for high-pixel lenses, necessitating a more reliable and robust solution.
Innovation Solution
An optical image stabilization component featuring a suspension mechanism with a spring wire formed by sequentially connected helical bending portions, where the outer diameter gradually decreases from the middle to the ends, and an elastic sheet connected to the carrier, enhancing structural reliability and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cylindrical metal suspension wire or elastic sheet is used, then the structure is simple, but the reliability and strength are poor
Solution Approach 1:
The spring wire is divided into multiple helical bending portions (first, second, third, and fourth helical bending portions) with different outer diameters. This segmentation allows each portion to bear different stress levels, with larger outer diameters at high-stress regions (middle and ends) and smaller outer diameters in the middle section, thereby improving overall reliability while managing structural complexity.
Solution Approach 2:
Different sections of the spring wire are designed with different outer diameters to match the local stress distribution. The first and fourth helical bending portions (at the ends) have larger outer diameters to withstand higher stress, while the second and third portions have smaller outer diameters. This local quality variation optimizes both reliability and material efficiency.
2Reliability
If conventional suspension wire is used, then the manufacturing is simple, but the stress distribution is uneven and reliability is poor
Solution Approach 1:
The spring wire features varying outer diameters across different sections, with the first and fourth helical bending portions having larger diameters and the second and third portions having smaller diameters. This local quality variation ensures uniform stress distribution throughout the suspension mechanism, preventing stress concentration and improving reliability.
Solution Approach 2:
The spring wire is designed with dynamic characteristics through its helical bending portions with varying outer diameters. This dynamic structure allows the spring wire to adapt to different stress conditions during operation, maintaining uniform stress distribution and improving reliability under varying loads.
3Strength
If conventional elastic sheet is used, then the structure is simple, but the impact resistance is poor
Solution Approach 1:
The suspension mechanism is segmented into multiple functional components: the spring wire with varying outer diameters for primary suspension and shock absorption, and the elastic sheet for additional impact resistance. This segmentation allows each component to specialize in specific functions, improving overall impact resistance while maintaining manageable structural complexity.
Solution Approach 2:
The suspension mechanism combines the spring wire (metallic material with elastic properties) and the elastic sheet (polymer material with high elasticity) to create a composite suspension system. This composite structure leverages the advantages of both materials to achieve superior impact resistance and reliability.
4Reliability
If the lens weight increases for high pixel applications, then the imaging quality improves, but the suspension mechanism reliability decreases
Solution Approach 1:
The spring wire is designed with larger outer diameters at the first and fourth helical bending portions (end sections) where stress is highest, and smaller outer diameters at the second and third portions (middle sections). This local quality variation allows the suspension mechanism to support heavier lenses while maintaining uniform stress distribution and preventing failure at critical stress points.
Solution Approach 2:
The spring wire is divided into multiple helical bending portions with different outer diameters, creating a segmented structure that can distribute and manage the increased load from heavier lenses. This segmentation prevents stress concentration and improves the overall load-bearing capacity and reliability of the suspension mechanism.
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 design ensures uniform stress distribution and higher reliability, allowing for wider application with heavier lenses by improving deformation uniformity and impact resistance, while maintaining linear motor performance.
Implementation Method 1
The structural reliability is ensured by the deformation of the spring wire itself when the optical image stabilization component drops
Implementation Method 2
the drive mechanism includes a circuit board mounted on a side of the base close to the casing, a drive coil fixedly mounted on a side of the circuit board away from the base, a drive magnetic steel fixedly mounted on the bracket and arranged corresponding to the drive coil
Data Source
AI summary
The present disclosure provides an optical image stabilization component, which includes a base, a suspension mechanism, a carrier, a drive mechanism, and a casing, where the suspension mechanism includes an elastic sheet connected to the carrier and a spring wire. The spring wire is formed by sequentially connecting multiple spiral bending portions in a nose to tail manner, and an outer diameter of each of the multiple spiral bending portions gradually decreases from a middle of the spring wire to two ends of the spring wire. The optical image stabilization component of the present disclosure occupies a smaller space, the drive performance in each direction is closer, the stress distribution is more uniform, and the reliability is higher. There are wider application scenarios in the background that the weight of the lens increases presently.