Lens Driving Device FPC Segmentation for Dual Camera Assembly
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Solution Overview
Problem
The existing lens driving devices for dual camera systems face assembly challenges due to the mismatch between the frame and Flexible Printed Circuits (FPC) caused by the bending accuracy issues of the FPC, which complicates the assembly process.
Innovation Solution
A lens driving device design featuring two movers, a long quadrangular frame body, at least two coils, and an FPC with specific terminal configurations that allow for easier assembly by ensuring proper alignment and connection of the frame and FPC, including external connecting terminal portions and surface portions that cover the coils and frame, facilitating easier wiring and reduced interference between magnetic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the FPC is bent 90 degrees from the first side to the second side and further bent 90 degrees to extend to the third side, then the coil can be electrically connected to the frame, but the frame and the FPC do not match well on the third side due to bending accuracy issues, making assembly difficult
Solution Approach 1:
The FPC is divided into multiple surface portions (first surface portion, second surface portion, third surface portion, fourth surface portion) that extend in different directions from the external connecting terminal portion. This segmentation allows each portion to independently cover different components (coils and frame) without requiring complex multi-angle bending, thereby maintaining both electrical connection reliability and assembly ease.
2Adaptability or versatility
If the FPC is bent multiple times to reach different coils, then all coils can be connected, but the bending accuracy requirements increase, causing mismatch between the frame and FPC
Solution Approach 1:
Instead of bending the FPC in multiple angles to reach different coils, the patent extends the FPC in multiple directions (first direction and second direction perpendicular to the first) from a single external connecting terminal portion. This dimensional approach allows the FPC to cover multiple coils and the frame without complex bending, reducing manufacturing precision requirements while maintaining adaptability.
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 enables easier assembly and reduced interference between magnetic components, improving the overall assembly process and reliability of the lens driving device, while maintaining accurate mounting positions for the coils.
Implementation Method 1
a coil is disposed on a frame opposite to the magnet
Data Source
AI summary
A lens driving device is disclosed that includes two movers, a long quadrangular frame body, at least two coils and an FPC. The movers are arranged side by side and provided with a through hole for accommodating a lens body, respectively. The frame body surrounds an outer periphery of the two movers. The two coils face one mover of the two movers and are fixed to two long sides of the frame body. The FPC includes coil connecting terminals electrically connected to the two coils.