Camera Module Foreign Object Blocking Structure
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Solution Overview
Problem
Camera modules face issues with lens barrel twisting during focusing due to erroneous operations and product movement, and adhesive foreign objects contaminating the Infrared Cut Filter (IRCF) during screw-connection, leading to image pollution and defects.
Innovation Solution
A camera module design featuring a lens barrel with a first spiral-removed region and a holder with a second spiral mesh, where epoxy is filled between the regions to prevent twisting and an auxiliary screw thread with an adhesive member to block foreign objects from reaching the IRCF during screw-connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If epoxy is coated between lens barrel and holder using coating needle, then lens barrel and holder are fixed, but lens focusing may be twisted due to erroneous operation or product movement
Solution Approach 1:
The coating surface is segmented into a spiral-removed region and a non-spiral region, allowing differential epoxy application. The spiral-removed region provides a stable bonding area without spiral interference, while maintaining lens focusing precision through controlled epoxy placement.
Solution Approach 2:
Different regions of the lens barrel have different surface treatments: the spiral-removed region has no spiral pattern for stable epoxy bonding, while other regions retain the original spiral structure. This local differentiation optimizes both fixing stability and focusing precision in respective areas.
2Strength
If screw-connection is used to couple bobbin and lens barrel, then mutual coupling is achieved, but sticky or adhesive foreign objects may be transmitted to IRCF during assembly
Solution Approach 1:
A foreign object blocking structure is introduced as an intermediary element between the screw threads and the IRCF. This blocking structure intercepts and retains adhesive foreign objects generated during screw-connection, preventing them from reaching and contaminating the IRCF while maintaining the coupling function.
Solution Approach 2:
The foreign object blocking structure converts the harmful effect of adhesive foreign objects into a beneficial retention mechanism. By strategically placing the blocking structure, foreign objects are captured and held in a controlled location, transforming a contamination risk into a contained, manageable condition.
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 effectively prevents lens barrel twisting during focusing and prevents adhesive foreign objects from reaching the IRCF, ensuring accurate focusing and image quality by using a UV-cured epoxy and a foreign object blocking unit to collect contaminants.
Implementation Method 1
an epoxy is filled in between the region removed of the first spiral and the holder
Data Source
AI summary
The present invention relates to a camera module, the camera module including a base formed at an upper surface of a PCB (Printed Circuit Board) mounted with an image sensor, and formed with an IRCF (Infrared Cut Filter) at a position corresponding to that of the image sensor, a bobbin vertically reciprocatively formed at an upper surface of the base, and having a bobbin screw thread at an upper surface, a lens barrel formed with a lens barrel screw thread at an outer surface for being screw-connected to an interior of the bobbin and mounted with at least one or more lenses, and a foreign object blocking unit formed at a screw-connected portion between the bobbin and the lens barrel to prevent sticky and adhesive foreign objects from being transmitted to an IRCF (Infrared Cut Filter) in the course of screw-connection between the lens barrel and the bobbin.