Lens Driving Module Space Maintaining Element Design
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Solution Overview
Problem
Conventional lens assemblies face challenges in manufacturing efficiency and yield rate due to complex thread structures and alignment requirements, which hinder the production of high-end specification electronic devices with accurate and smooth lens movement.
Innovation Solution
A lens driving module comprising a base, shield can, driving mechanism, space maintaining element, and damping element, where the space maintaining element includes a plastic frame portion and metal structure portion with pins, and a damping element connected to the lens unit, utilizing a magnetic force for movement and a bump structure to prevent noise and improve focus stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If thread structures are used to assemble lens barrel and lens carrier, then the lens assembly can be adjusted for focusing, but the size of the lens assembly and assembling complexity increase
Solution Approach 1:
The patent merges the lens carrier and lens barrel into a single integrated lens assembly structure, eliminating the need for separate thread-based connections. The lens carrier integrates the focusing mechanism directly into the lens barrel structure, reducing assembling complexity while maintaining focusing functionality.
Solution Approach 2:
The patent extracts and eliminates the thread structure from the lens assembly design. By removing the threaded connection mechanism between lens barrel and lens carrier, the design achieves simpler assembly while maintaining the necessary focusing adjustment capability through alternative mechanisms.
2Manufacturing precision
If multiple alignment and calibration steps are performed during assembly, then the accuracy and smoothness of lens unit movement are improved, but the manufacturing efficiency and yield rate are reduced
Solution Approach 1:
The patent incorporates preliminary positioning features directly into the integrated lens assembly structure during manufacturing. Alignment marks and positioning elements are pre-formed as part of the lens carrier and lens barrel integration process, eliminating the need for subsequent alignment and calibration steps while ensuring accurate lens unit movement.
Solution Approach 2:
By merging the lens carrier and lens barrel into a single integrated structure with built-in positioning features, the patent eliminates multiple separate alignment operations. The focusing mechanism is integrated such that positioning and alignment are achieved automatically during the single assembly operation rather than requiring multiple sequential calibration steps.
3Ease of operation
If a voice coil motor is used as camera driver module for auto focus, then the lens unit can be driven for focusing, but the number of components increases and assembly complexity increases
Solution Approach 1:
The patent merges the voice coil motor components directly into the integrated lens assembly structure. The motor elements are incorporated as integral parts of the lens carrier and lens barrel, eliminating the need for separate motor modules and reducing the total number of components while maintaining auto focus capability.
Solution Approach 2:
The patent extracts the motor functionality from separate components and integrates it directly into the lens assembly structure. By taking out the motor as a separate module and incorporating it into the integrated design, the number of discrete components is reduced while preserving the auto focus driving function.
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 efficiency, reduces assembly complexity, and improves focus stability and image quality by optimizing the space maintaining element's design and magnetic force arrangement, leading to a more reliable and efficient lens driving mechanism.
Implementation Method 1
The lens unit is movable in the direction parallel to the optical axis by a magnetic force generated by an interaction between the at least one magnet and the at least one coil
Data Source
AI summary
A lens driving module includes a base, a shield can, a driving mechanism, a space maintaining element and a damping element. The base has an opening. The shield can is coupled to the base and has a central aperture corresponding to the opening. The driving mechanism is disposed in the shield and configured to drive a lens unit to move. The space maintaining element is in physical contact with the shield can. The space maintaining element includes a plastic frame portion and a metal structure portion. The metal structure portion includes pins extending toward the base. The metal structure portion is insert-molded with the plastic frame portion to form the space maintaining element. The damping element is connected to the pins and the lens unit. The pins of the metal structure portion are located closer to the optical axis than part of the metal structure portion without the pins.