Camera Module Foreign Object Inhibiting Structure
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Solution Overview
Problem
Existing camera modules face issues with contamination due to foreign objects from soldered connections and adhesive leakage during assembly, leading to defects.
Innovation Solution
The camera module incorporates a dual-tier coated layer system at electrical contact points to prevent foreign object contamination and uses strategically designed lugs and void spaces for adhesive application to prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If soldering is used to electrically connect the actuator to the terminal, then electrical connection is achieved, but foreign objects from flux or solder may fall into the camera module and cause contamination
Solution Approach 1:
The harmful soldering process and flux materials are extracted and replaced with a mechanical press-fit connection system. The actuator is electrically connected to the terminal through direct contact without soldering, eliminating the source of foreign object contamination while maintaining electrical connectivity.
Solution Approach 2:
A terminal structure acts as an intermediary between the actuator and the external circuit. The terminal includes a contact portion that receives the actuator's electrical contact in a press-fit manner, providing both mechanical support and electrical connection without requiring soldering.
2Strength
If epoxy adhesive is used to attach the case to the holder, then strong bonding is achieved, but the adhesive may be compressed and squeezed out, causing defects
Solution Approach 1:
Recesses are pre-formed in the case and holder structures at the bonding interface. These recesses are prepared in advance to accommodate the epoxy adhesive, allowing the adhesive to be contained within specific volumes and preventing it from being squeezed out during assembly compression.
Solution Approach 2:
The case and holder have different local structures at the bonding interface - recesses are formed in specific locations to create adhesive containment zones. This local structural modification allows the adhesive to be applied and contained in controlled areas, maintaining bonding strength while preventing leakage.
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
This solution effectively prevents pollution from foreign objects and adhesive-related defects, enhancing the reliability and integrity of the camera module.
Implementation Method 1
a VCM (Voice Coil Motor) is a motor developed based on the principle that a diaphragm in a speaker is vibrated by a force generated between voice current flowing in the coil of a speaker and a magnetic force of a permanent magnet according to the Fleming's left-hand rule
Data Source
AI summary
A camera module includes a printed circuit board; an image sensor disposed on the printed circuit board, a lens disposed at a position corresponding with the image sensor, an actuator configured to move the lens, a conductive member electrically connected with the actuator and an insulation member disposed on the conductive member. The insulation member comprises an epoxy. The insulation member is disposed on an outer surface of the conductive member.