Camera Module Lens Barrel Adhesive Overflow Prevention
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Solution Overview
Problem
Camera modules face issues with adhesive overflow during assembly, leading to potential damage to internal components and misalignment of the lens barrel, which can result in focal length deviations and performance deterioration.
Innovation Solution
The use of a first protrusion to prevent adhesive overflow and a second adhesive portion with a lower outer surface height to contain adhesive, along with an adhesive containing a filler to minimize displacement and maintain the lens barrel's position, ensures accurate alignment and reduces contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive is used to couple the lens barrel to the lens holder, then the lens barrel can be assembled to the lens holder, but adhesive may overflow and cause damage to internal elements
Solution Approach 1:
A positioning protrusion is introduced as an intermediary structure between the lens holder and lens barrel. This protrusion fits into a corresponding positioning groove to precisely locate the lens barrel, preventing adhesive overflow while maintaining assembly ease
Solution Approach 2:
The positioning protrusion and groove are pre-formed on the lens holder and lens barrel respectively before assembly. This preliminary positioning structure ensures that when adhesive is applied, it cannot overflow to damage internal elements, as the components are already precisely located
2Ease of manufacture
If the lens barrel is disposed outside the designated position on the lens holder, then assembly is easier, but the focal length between the lens and image sensor differs from the designed value
Solution Approach 1:
The positioning protrusion acts as a mediator that transfers the precise positioning function from the adhesive bond to a mechanical structure. This ensures the lens barrel is located at the exact designated position on the lens holder, maintaining focal length accuracy while simplifying the assembly process
Solution Approach 2:
By pre-forming the positioning protrusion and groove, the correct position is established before final assembly. This preliminary action ensures that even if the lens barrel is initially placed outside the designated position, the positioning structures guide it to the correct location, maintaining manufacturing precision
Data Source
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AI summary
One embodiment of a camera module includes: a lens barrel provided with at least one lens; and a lens holder having the lens barrel coupled thereto, wherein the lens barrel may have a first adhesive part formed thereon having the bottom surface thereof facing the top surface of the lens holder and adhered to the lens holder, the lens holder may have a second adhesive part formed thereon having the top surface thereof facing the bottom surface of the lens barrel and adhered to the lens barrel, and a first recessed groove having at least a portion of an adhesive deposited therein may be formed in the second adhesive part.