Camera Module Lens Barrel Notches Reduce Turning Resistance
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Solution Overview
Problem
Camera modules face difficulties in focusing due to excessive twisting between the metal lens barrel and plastic lens bracket when threaded together, resulting from their different machining characteristics.
Innovation Solution
The camera module design incorporates a lens barrel with notches on its surface, allowing for deformation and reduced turning resistance when rotated, and a sealant between the lens bracket and printed circuit board to facilitate easier focusing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the lens barrel and lens bracket are threaded together, then the assembly is fixed and stable, but excessive twisting occurs between the metal lens barrel and plastic lens bracket making focusing difficult
Solution Approach 1:
The lens barrel is segmented into multiple sections with notches created on its surface. These notches divide the continuous metallic surface into segmented regions that can independently deform during rotation, reducing overall twisting resistance while maintaining structural integrity and assembly stability.
Solution Approach 2:
The notches are strategically positioned on specific portions of the lens barrel rather than uniformly across the entire surface. This local modification creates zones of reduced rigidity where deformation can occur more easily during focusing rotation, while other portions of the lens barrel maintain their structural strength and stability.
2Strength
If the lens barrel is made of metal for strength, then assembly stability is improved, but turning resistance increases making focusing harder
Solution Approach 1:
The metal lens barrel maintains its overall strength and rigidity while having localized notches introduced on its surface. These notches create specific regions with reduced mechanical strength and increased flexibility, allowing the barrel to deform more easily during rotation for focusing while the bulk material retains its strength properties.
Solution Approach 2:
The lens barrel combines metal material with notched structural features, creating a composite-like structure where the metal provides overall strength and the notched regions provide controlled deformation zones. This hybrid approach balances strength requirements with operational ease.
Data Source
AI summary
A camera module to retain a smooth and easy focusing movement through components connected together by threads includes a lens bracket and a lens barrel. The lens bracket carries an optical lens and includes sidewall with a first internal thread. The optical lens includes sensor end. The sensor end includes a lateral surface with an external thread which corresponds to the first internal thread. The lateral surface defines several notches extending from the end of the lateral surface down through the external threads to reduce any clamping or high turning resistance between the internal and the external threads.