Lens Module Concave-Convex Matching Structure Assembly Stability
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Solution Overview
Problem
The existing lens module structures face challenges in achieving high matching stability between glass lenses and their components due to poor roundness, which affects the overall performance of the lens.
Innovation Solution
A novel lens module design featuring a concave-convex matching structure between the glass lens and the light-shading plate, where the glass lens has a recess portion with oblique and arcuate surfaces, and the light-shading plate has protruding portions, allowing for improved alignment and assembly stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a glass lens is used to match the lens barrel or other components, then the precision of outer diameter is improved, but the matching roundness becomes difficult to achieve and assembly stability deteriorates
Solution Approach 1:
The glass lens is divided into an optical portion and a peripheral portion, with the peripheral portion featuring a recess structure that segments the matching interface. This segmentation allows the peripheral portion to be separately optimized for mechanical matching while the optical portion maintains optical performance.
Solution Approach 2:
The recess portion of the peripheral portion includes an arcuate surface that provides curved matching surfaces. This curvature design improves the roundness and contact area between the glass lens and the light-shading plate, enhancing assembly stability and matching reliability.
2Ease of manufacture
If the glass lens structure is simplified, then the manufacturing process is easier, but the matching roundness and assembly stability deteriorate
Solution Approach 1:
The lens structure is segmented into optical and peripheral portions, allowing the peripheral portion with the recess structure to be designed independently. This segmentation enables the use of molds with recess structures during manufacturing, making the production process easier while maintaining high matching roundness.
Solution Approach 2:
The recess structure in the peripheral portion includes oblique surfaces and arcuate surfaces with specific geometric parameters. By optimizing these parameters, the design achieves both ease of manufacture through standard molding processes and high matching roundness for stable assembly.
Data Source
AI summary
Provided is a lens module, including a lens barrel, a lens group and a light-shading plate. The lens group at least comprises a first lens and a second lens. The light-shading plate is sandwiched between the first lens and the second lens. The first lens includes a first optical portion, and a first peripheral portion, which includes a first planar surface extending from an outer edge of the first peripheral portion, a recess portion connected to the first planar surface, and a second planar surface connected to the recess portion. The light-shading plate includes a third planar surface partially attached to the first planar surface, a protruding portion protruding from the third planar surface, and a fourth planar surface extending from the protruding portion towards the optical axis. The protruding portion is attached to the recess portion, and the second planar surface and the fourth planar surface are spaced apart.