Lens Module Concave-Convex Matching Structure for Glass Lens Stability
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Solution Overview
Problem
Existing lens modules face challenges in achieving high matching stability between glass lenses and their components due to poor roundness, affecting overall performance.
Innovation Solution
A novel lens module design incorporating a concave-convex matching structure between the lens barrel and glass lenses, utilizing a protruding portion on the barrel and a recessed portion on the lens for improved alignment and stability, along with light-shading members for stray light absorption.
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 poor due to the ever-existing difficult problem of combination
Solution Approach 1:
The patent introduces a curved matching surface (concave or convex arc surface) on the lens barrel that corresponds to the curved outer surface of the glass lens. This curvature matching ensures that the glass lens maintains stable roundness during assembly and operation, resolving the matching roundness problem while preserving outer diameter precision.
Solution Approach 2:
The patent introduces a lens holder as an intermediary component between the glass lens and the lens barrel. The lens holder provides a precise mounting structure with curved inner surfaces that match the glass lens outer surface, acting as a mediator to ensure stable matching roundness while maintaining the precision of the glass lens outer diameter.
2Device complexity
If the matching structure between glass lens and lens barrel is simplified, then the device complexity is reduced, but the matching stability deteriorates
Solution Approach 1:
The patent integrates the matching structure directly into the lens barrel body, combining the barrel wall and matching surface into a single component. This merging approach reduces the number of separate parts and assembly steps while maintaining stable matching through the precisely formed curved surface, thus reducing device complexity without sacrificing matching stability.
Solution Approach 2:
The curved matching surface design provides inherent stability through geometric conformality. The arc-shaped surface naturally guides and stabilizes the glass lens positioning, ensuring consistent matching roundness without requiring complex additional stabilization mechanisms, thereby maintaining simplicity while improving reliability.
Data Source
AI summary
Provided is a lens module, including a lens barrel and a lens group. The lens barrel includes a first barrel wall and a second barrel wall. The lens group at least include a first lens and a second lens. The first barrel wall has an image-side surface, including a first planar surface horizontally extending from a joint between the first barrel wall and the second barrel wall towards an optical axis, a protruding portion connected to the first planar surface and protruding towards the first lens, and a second planar surface horizontally extending from the protruding portion towards the optical axis. The first lens has a first peripheral portion, including a third planar surface, a recess portion connected to the third planar surface and a fourth planar surface connected to the recess portion. The protruding portion is attached to the recess portion.