Camera Module Barrel Holder Integration for Focal Point Alignment
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Solution Overview
Problem
Conventional camera modules face issues with foreign matter contamination and resolution failures due to friction and tilting during focal point adjustment, which prolongs the assembly process and increases costs.
Innovation Solution
A camera module design where the barrel and holder are integrally formed, with a fixing portion at the lower end of the holder matching the height from the printed circuit board to the image sensor, eliminating the need for focal point adjustment and using adhesive and screw coupling mechanisms to secure components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lens barrel is screw coupled to the holder for focal point adjustment, then the focal point can be adjusted, but foreign matters are generated due to friction between the holder and screw coupling portion
Solution Approach 1:
The lens barrel and holder are integrally formed as a single piece, eliminating the screw coupling interface between them. This merging removes the source of friction-generated foreign matters while maintaining focal point adjustment capability through the integrated structure's movement mechanism.
Solution Approach 2:
The holder is divided into separate functional portions: a body portion that is integrally formed with the lens barrel, and a leg portion that extends downward to contact the printed circuit board. This segmentation allows the adjustment mechanism to operate without friction at the critical interface while maintaining structural support.
2Ease of manufacture
If the lens barrel is screw coupled to the holder, then assembly is possible, but resolution failure occurs due to tilting of the lens barrel
Solution Approach 1:
The lens barrel and holder body portion are integrally formed, eliminating the screw coupling interface that causes tilting and alignment issues. This integration ensures precise alignment is maintained throughout the assembly process without the risk of tilting during assembly.
Solution Approach 2:
The leg portion acts as an intermediary element that provides a stable mounting interface with the printed circuit board. By extending downward to contact the PCB, it provides a rigid reference that prevents tilting of the integrated lens barrel-holder assembly during assembly and operation.
3Reliability
If the lens barrel is screw coupled to the holder for focal point adjustment, then focus can be tuned, but assembly time increases
Solution Approach 1:
The lens barrel and holder are integrally formed as a single component, eliminating the multi-step screw coupling and adjustment process. This merging allows the focal point to be predetermined during manufacturing, significantly reducing assembly time while maintaining the necessary optical functionality.
Solution Approach 2:
The focal point positioning is predetermined during the integral formation of the lens barrel and holder body portion. This preliminary action eliminates the need for time-consuming focal point adjustment during final assembly, as the optimal focus position is already established in the manufacturing process.
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
Prevents foreign matter contamination, reduces assembly time and costs by omitting the focal point adjustment process, and ensures precise alignment of the focal point with the image sensor plane.
Implementation Method 1
The fixing portion may comprise a first adhesive member interposed between a lower surface of the fixing portion and an upper surface of the printed circuit board
Implementation Method 2
it may comprise a second adhesive member interposed between an inner circumferential surface of the coupling portion and an outer circumferential surface of the support portion
Data Source
AI summary
A camera module according to the present invention may comprise: a barrel that accommodates a lens therein; a printed circuit board formed under the barrel and mounted with an image sensor; a body portion integrally formed with the barrel; a holder comprising a leg portion formed by being extended downward from the lower end of the body portion to the same height as the image plane of the lens; and a fixing portion formed downward from the leg portion to have a predetermined thickness to fix the holder to the printed circuit board, wherein the thickness of the fixing portion may be equal to the height from the upper surface of the printed circuit board to the image plane of the image sensor.