Lens Module Pressing Ring Assembly Precision
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Solution Overview
Problem
Existing lens modules face issues with poor roundness of the pressing ring due to burrs, leading to assembly precision problems and a low yield rate, as the pressing ring is prone to deflection during assembly.
Innovation Solution
The design includes a pressing ring with a first surface extending towards the object side from the inner connecting surface, allowing it to abut against the lens without requiring alignment with the lens barrel's outer diameter, thereby avoiding deflection and improving assembly precision, and uses a plastic lens with specific surface features for enhanced imaging quality and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pressing ring outer diameter is matched with the lens barrel inner diameter for assembly, then the pressing ring can be assembled into the lens barrel, but the pressing ring has poor roundness due to burrs and is easy to deflect during assembly, resulting in low assembly precision
Solution Approach 1:
The patent removes the pressing ring from the lens barrel assembly, replacing it with a pressing plate that is integrated with the lens holder. This extraction eliminates the pressing ring's outer diameter matching requirement and its associated burr problems, directly resolving the contradiction between assembly precision and roundness reliability.
Solution Approach 2:
The patent merges the pressing ring function with the lens holder by integrating a pressing plate into the lens holder structure. This combination eliminates the separate pressing ring component that causes deflection and roundness issues, thereby improving both assembly precision and manufacturing reliability.
2Productivity
If the pressing ring is used to fix the lens, then the lens can be held in position, but the pressing ring is prone to deflection when assembling, resulting in lower yield rate
Solution Approach 1:
By removing the pressing ring from the assembly process and replacing it with an integrated pressing plate, the patent eliminates the source of deflection and precision loss. This directly improves manufacturing yield rate by preventing assembly failures caused by pressing ring deflection.
Solution Approach 2:
The pressing plate is pre-integrated with the lens holder in a preliminary manufacturing step, ensuring proper positioning and eliminating the need for separate pressing ring assembly. This preliminary action prevents deflection issues and improves overall manufacturing precision and yield rate.
Data Source
AI summary
The present disclosure discloses a lens module. The lens module includes a lens barrel, a lens having an optical axis accommodated in the lens barrel, and a pressing ring abutted against the lens from an image side. The pressing ring includes an upper surface close to an object side, a lower surface disposed opposite to the upper surface, an inner connecting surface connecting the upper surface and the lower surface, and an outer connecting surface opposite to the inner connecting surface. The outer connecting surface is abutted against the lens barrel. The lens module provided by the present disclosure can ensure the assembly precision of the pressing ring and improve the yield rate of the lens module.