Lens Actuating Module Rectangular Suspension Wires
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Solution Overview
Problem
Current lens actuating modules with optical image stabilization for mobile terminals face challenges in automated assembly due to the small circular cross-section of metal suspension wires, leading to increased slippage and reduced assembling yield rates, as well as difficulties in maintaining collimation accuracy.
Innovation Solution
A lens actuating module design featuring metal suspension wires with a rectangular cross-section, where more than 95% of the wire's length has a cross-section orthogonal to the optical axis, with specific dimensions that enhance contact area and assembly precision, allowing for improved automated assembly and reduced module tilt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If metal suspension wires with circular cross-section are used, then manufacturing convenience is improved, but automated assembly difficulty increases due to small contact area causing slippage
Solution Approach 1:
The patent changes the cross-sectional shape of the suspension wire from circular to rectangular, creating an asymmetric geometry that provides a larger contact area for automated assembly equipment. This rectangular cross-section allows gripping tools to contact multiple points simultaneously, preventing slippage during automated handling while maintaining manufacturing feasibility through standard wire forming processes.
2Volume of moving object
If circular cross-section of suspension wire is reduced for miniaturization, then module size is reduced, but automated assembly becomes impossible due to contact area smaller than human hair thickness
Solution Approach 1:
The patent employs a rectangular cross-section for the suspension wire instead of a circular one. This geometric change allows the wire to maintain a compact size suitable for miniaturization while providing a larger effective contact area for automated assembly equipment. The rectangular profile enables multiple contact points along the wire length, making automated gripping feasible even at reduced dimensions.
3Adaptability or versatility
If different assembling heights of metal suspension wires are used, then assembly flexibility is improved, but module tilt occurs reducing assembling yield rate
Solution Approach 1:
The patent specifies that the suspension wire should have a rectangular cross-section with particular dimensional relationships (width to length ratio within 0.54 to 1.85) to ensure uniform mechanical properties along the wire. This standardized local geometry ensures consistent bending characteristics and assembly height control, preventing module tilt while maintaining assembly flexibility through proper wire length selection.
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 rectangular cross-section design reduces slippage during automated assembly, enhances assembling yield rates, and maintains collimation accuracy, thereby improving the overall performance and reliability of the lens actuating module.
Implementation Method 1
The lens actuator includes at least one elastic member and at least three suspension wires
Data Source
AI summary
A lens actuating module includes a holder, a cover, a lens and a lens actuator. The holder includes an opening hole and at least three first connecting portions. The cover is coupled to the holder and includes a through hole correspondent to the opening hole. The lens with an optical axis is correspondent to the through hole. The lens actuator is movably disposed in the cover and includes at least one elastic member and at least three suspension wires. The elastic member includes at least three second connecting portions. A longitudinal direction of each of the suspension wires is parallel to the optical axis. Two ends of each of the suspension wires are fixedly connected with one of the first connecting portions and one of the second connecting portions, respectively. More than 95% of each of the suspension wires along the longitudinal direction has a rectangular cross-section.