Imaging Lens Holder Assembly With Dual-Roller Guide Alignment
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Solution Overview
Problem
Conventional optical systems in electronic devices face challenges in achieving high image quality and compactness due to complex structures and assembly issues such as warpage and increased size, which are exacerbated by the need for functionalities like auto focus and optical zoom.
Innovation Solution
An imaging lens driving module with a lens system, lens holder assembly, base, rollable support assembly, and driving mechanism, utilizing guiding grooves and rollable support elements with different diameters to allow parallel movement of lens holders, ensuring foolproof assembly and reducing size through shared or partially shared rail designs and light-folding elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional optical systems include multiple functional components (auto focus, optical zoom, optical image stabilization), then the functionality and image quality are improved, but the structure becomes more complex and the size increases
Solution Approach 1:
The patent combines multiple optical functional components (lens groups for auto-focus, optical zoom, and optical image stabilization) into a single integrated optical system. The first and second optical lens groups are arranged in sequence along the optical axis within a unified structure, allowing multiple functionalities to be achieved without proportionally increasing overall system complexity
Solution Approach 2:
The optical system is designed with multi-functional lens groups that can perform multiple operations. The first optical lens group can perform both auto-focus and optical zoom operations, while the second optical lens group performs optical image stabilization, creating a universal system that handles multiple functions through coordinated movement of lens groups rather than requiring separate dedicated components for each function
2Adaptability or versatility
If conventional optical systems include multiple functional components, then the functionality is improved, but the size of the optical system and electronic device increases
Solution Approach 1:
The patent employs a nested arrangement where the first and second optical lens groups are positioned in sequence along the optical axis within a compact configuration. The lens groups are nested within the housing structure, with the first lens group positioned closer to the object side and the second lens group positioned closer to the image sensor, maximizing space utilization and minimizing the overall volume of the optical system
Solution Approach 2:
The patent utilizes the optical axis dimension efficiently by arranging lens groups in sequence along this dimension rather than spreading them out in lateral directions. The coordinated movement of lens groups along the optical axis enables multiple functions (focus adjustment, zoom, stabilization) to be achieved within a compact volume by exploiting the longitudinal dimension of the optical path
3Ease of manufacture
If conventional optical systems use traditional assembly methods, then assembly is performed, but assembly errors and warpage occur leading to increased defective rate
Solution Approach 1:
The patent incorporates a pre-designed support structure with guiding grooves and support surfaces that are formed during the housing manufacturing process. These guiding features are preliminarily established in the housing before assembly, providing precise alignment paths and support for the optical lens groups. This preliminary action ensures that components self-align during assembly, reducing assembly errors and warpage that would otherwise occur with traditional manual alignment methods
Solution Approach 2:
The support structure acts as an intermediary element between the housing and the optical lens groups. The guiding grooves and support surfaces provide a mediating interface that transfers and constrains the movement of lens groups along predetermined paths. This intermediary structure ensures accurate positioning and reduces assembly errors by providing mechanical guidance and support, thereby lowering the defective rate caused by misalignment and warpage
Data Source
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AI summary
An imaging lens driving module (1e) includes a lens system (11e), a lens holder (12e) accommodating optical lens elements (LE) of the lens system (11e), a base (13e), a rollable support assembly (14e) and a driving mechanism (15e). The base (13e) includes first and second guiding grooves (131e, 132e) extending in a direction parallel to the optical axis (OA), disposed opposite to each other and facing the lens holder (12e). The reliable support assembly (14e) is in physical contact with and disposed between the lens holder (12e) and the base (13e) and includes principal and auxiliary rollable support elements (141e, 142e). The principal rollable support element (141e) is disposed between the lens holder (12e) and the first guiding groove (131e). The auxiliary rollable support element (142e) is disposed between the lens holder (12e) and the second guiding groove (132e). The driving mechanism (15e) is configured to drive the lens holder (12e) to move. Diameters of the principal and auxiliary rollable support elements (141e, 142e) in physical contact with the lens holder (12e) are different from each other.