Imaging Lens Driving Module with Segmented Elastic Arms
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Solution Overview
Problem
Conventional camera modules face challenges in achieving both high image quality and compactness due to complex structures required for functionalities like auto focus and optical zoom, leading to assembly errors and increased defective rates caused by uneven installation of elastic elements and warpage issues.
Innovation Solution
An imaging lens driving module with a metal elastic element, coil, and magnet assembly, featuring a compensating elastic part to prevent tilting and correct assembly errors, coupled with a metal conductive element for improved assembly efficiency and reduced warpage, ensuring precise movement of the lens carrier along the optical axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional lens driving units use elastic elements to drive the lens carrier, then the lens carrier can move along the optical axis, but assembly errors and warpage occur causing uneven installation and tilting
Solution Approach 1:
The elastic element is divided into multiple independent elastic arms (first elastic arm, second elastic arm, third elastic arm, fourth elastic arm) that can be independently assembled. Each arm has a corresponding assembly groove on the lens carrier, allowing precise positioning and reducing assembly errors. This segmentation enables each elastic arm to be independently installed and adjusted, eliminating the warpage and tilting problems caused by conventional single-piece elastic elements.
Solution Approach 2:
The patent introduces non-contact support structures (support posts and support grooves) as intermediaries between the elastic elements and the lens carrier. These support structures provide precise positioning and reduce direct contact pressure, preventing warpage and tilting during assembly. The support mechanism acts as a mediator that ensures accurate alignment and stable installation of the elastic elements.
2Manufacturing precision
If camera modules include functionalities like auto focus and optical zoom, then image quality improves, but the structure becomes more complex and size increases
Solution Approach 1:
The lens driving unit is designed with multi-functionality to achieve both auto focus and optical zoom capabilities. The same elastic elements and driving mechanism are used to control the movement of multiple lens groups (first lens group and second lens group) along the optical axis. This universal design allows a single complex mechanism to perform multiple functions, avoiding the need for separate driving units for each function and thereby reducing overall structural complexity.
Solution Approach 2:
The patent combines the driving mechanisms for different lens groups into a unified structure. The first and second lens groups are both driven by the same type of elastic elements and support structures, merging similar functional components into a single integrated system. This consolidation reduces the number of separate parts and simplifies the overall assembly process while maintaining both auto focus and optical zoom functionalities.
3Ease of operation
If elastic elements are installed in conventional lens driving units, then the lens carrier can be driven, but assembly warpage occurs causing uneven installation and tilting
Solution Approach 1:
The elastic element is segmented into multiple independent arms with corresponding assembly grooves on the lens carrier. This segmentation allows each arm to be independently positioned and installed, ensuring uniform installation across all elastic elements. The grooves provide precise alignment features that guide each elastic arm into its correct position, eliminating the uneven installation and tilting problems caused by conventional single-piece elastic elements.
Solution Approach 2:
The lens carrier is pre-provided with assembly grooves at specific positions before the elastic elements are installed. These pre-formed grooves serve as guides and positioning features that ensure the elastic arms are installed uniformly and correctly aligned. This preliminary preparation of the assembly structure simplifies the installation process and ensures consistent positioning, improving both assembly ease and installation uniformity.
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 enhances manufacturing yield and reduces assembly errors, maintaining electrical connection stability and improving the resolution quality of the imaging lens system, while allowing for compact and efficient camera module design.
Implementation Method 1
The driving mechanism includes a metal elastic element, a coil and a magnet assembly
Implementation Method 2
the metal elastic element further includes an electrically connecting part and a compensating elastic part
Data Source
AI summary
An imaging lens driving module includes a lens carrier, a frame element, a driving mechanism and a metal conductive element. The lens carrier is disposed in the frame element. The driving mechanism includes a metal elastic element, a coil and a magnet assembly. The metal elastic element includes an outer fixing part coupled to the frame element, an inner fixing part coupled to the lens carrier, and an elastic part. The coil is fixed to the lens carrier and disposed corresponding to the magnet assembly. The metal conductive element is coupled to the lens carrier. The metal elastic element further includes an electrically connecting part and a compensating elastic part. The metal conductive element has a corresponsive surface corresponding to and electrically connected to the electrically connecting part. The compensating elastic part is connected to the electrically connecting part and the inner fixing part.