Lens Module Boss Pressing Ring Assembly Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lens modules face assembly precision issues due to burrs in the pressing ring's outer diameter, leading to deflection and lower yield rates, and the use of glass lenses can result in fragility and imaging quality degradation.
Innovation Solution
A lens module design featuring a pressing ring with a boss structure that abuts against the lens, eliminating the need for diameter matching and enhancing assembly precision, combined with a plastic lens that reduces fragility and improves imaging quality by preventing dents and spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pressing ring outer diameter is matched with the lens barrel inner diameter, 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, resulting in low assembly precision
Solution Approach 1:
The patent extracts the pressing ring from the lens barrel assembly and gives it an independent function by adding a boss structure that directly presses the lens. This eliminates the dependency on precise diameter matching between the pressing ring outer diameter and lens barrel inner diameter, thereby removing the source of assembly precision problems caused by burrs and deflection.
Solution Approach 2:
The patent applies local quality by adding a boss structure at a specific location on the pressing ring. This local structural enhancement concentrates the pressing force on the lens through the boss, while the rest of the pressing ring maintains its original function of positioning within the lens barrel, thus improving assembly precision without compromising overall structure.
2Reliability
If glass lens is used, then imaging quality can be maintained, but the lens is fragile and prone to dents and spots, resulting in lower reliability
Solution Approach 1:
The patent changes the material parameter of the lens from glass to plastic. This material substitution fundamentally alters the physical properties: plastic lenses are more durable and resistant to dents and spots compared to glass lenses, while maintaining sufficient optical performance for the application, thus improving reliability without significantly compromising imaging quality.
3Ease of manufacture
If the pressing ring structure is simplified without a boss, then manufacturing is easier, but assembly precision deteriorates due to deflection and poor roundness
Solution Approach 1:
The patent segments the pressing ring structure into two functional parts: the ring portion that provides positioning within the lens barrel, and the boss portion that provides lens pressing function. This segmentation allows each part to be optimized independently - the ring can be manufactured with standard tolerances while the boss provides the precise pressing action needed for assembly precision.
Data Source
AI summary
The present disclosure discloses a lens module. The lens module includes a lens barrel, a lens, and a pressing ring abutting against the lens from an image side. The pressing ring includes an upper surface, a lower 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 includes an optical portion and a bearing portion. The bearing portion includes an image-side surface close to the image side, the upper surface is provided with a boss extending towards an object side. 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.