Integrated Lens Barrel Holder for Camera Module Assembly
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Solution Overview
Problem
Conventional camera modules face issues with image defocus and foreign object defects due to inappropriate tension forces during assembly, and they have complex structures that increase manufacturing costs and assembly time.
Innovation Solution
A camera module design featuring a holder with optical transmission holes, lens mounting units, and a fixture ring with adhesive fixation, which simplifies assembly, reduces the need for separate focus adjustments, and minimizes defects by using a combination of circular and polygonal shapes for the lens and fixture ring, and epoxy resin adhesive for secure bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If screw coupling is used to connect lens barrel and holder, then focusing work can be performed by rotating the lens barrel, but image defocus occurs due to loose coupling when tension force is low
Solution Approach 1:
The lens barrel and holder are integrated into a single molded part, eliminating the separate screw coupling mechanism. This merging of components ensures fixed optical distance and prevents loose coupling, while maintaining focusing capability through the integrated design.
Solution Approach 2:
The integrated lens barrel-holder structure serves multiple functions simultaneously: it provides structural support, maintains optical distance, enables focusing operation, and eliminates the need for separate coupling mechanisms. This multi-functionality resolves the contradiction by combining reliability and ease of operation in one component.
2Ease of operation
If high tension force is applied in screw coupling, then focusing can be performed by rotating lens barrel, but foreign objects are generated by friction between threaded parts
Solution Approach 1:
By merging the lens barrel and holder into one component, the threaded coupling interface is eliminated entirely. This removes the source of friction-generated foreign objects while preserving the focusing function through the integrated structure's rotational capability.
3Productivity
If multi-cavity injection molding is used to enhance productivity, then manufacturing efficiency increases, but deviation between cavities causes formability issues
Solution Approach 1:
The lens barrel and holder are merged into a single integrated component molded in one piece. This eliminates the need for multi-cavity molding of separate parts, thereby avoiding cavity deviation issues while maintaining high productivity through efficient single-cavity molding of the combined structure.
4Reliability
If adhesive is used to fix lens barrel and holder, then coupling is achieved, but adhesive leaks out to form protrusion
Solution Approach 1:
The lens barrel and holder are merged into a single molded part, eliminating the need for adhesive application. This prevents adhesive leakage and protrusion formation while maintaining strong coupling through the integrated structure, thereby resolving both reliability and appearance concerns.
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 design enhances assembly efficiency, reduces defects, and lowers manufacturing costs by maintaining focal length without separate adjustments and eliminating foreign object issues, while providing a simplified structure for convenient assembly.
Implementation Method 1
a fixture ring to be inserted into the holder and fixed at an image sensor for fixing one or more lenses
Data Source
AI summary
Disclosed is a camera module and a manufacturing method thereof, wherein the camera module includes a PCB (Printed Circuit Board) mounted with an image sensor, a holder fixed at the PCB, with one side formed with an optical transmission hole and the other side being opened, one or more lenses to be inserted into the holder, and a fixture ring to be inserted into the holder and fixed at an image sensor for fixing one or more lenses, whereby occurrence of defect caused by introduction of foreign objects during assembly of camera module can be minimized, and structure of camera module can be simplified to facilitate the assembling process and to reduce the assembling time.