Lens Module Protrusion Groove Alignment Mechanism
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Solution Overview
Problem
Existing lens modules face challenges in optical axis alignment due to the need for identical machining of lenses and difficulty in attaching lenses to the lens barrel, particularly with the press-fitting method, which requires precise conical surfaces that are hard to manufacture.
Innovation Solution
A lens module design featuring a protrusion and groove system on the lenses with varying radii and shapes, allowing for easy alignment and contact points that do not require precise machining, enabling the lenses to be easily assembled and aligned within the lens barrel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If lenses are manufactured to have identical conical surfaces for alignment, then optical axis alignment precision is improved, but manufacturing complexity and difficulty increase
Solution Approach 1:
The patent introduces a lens holder as an intermediary component that provides alignment features (protrusions and grooves) separate from the lenses themselves. This mediator enables precise optical axis alignment without requiring the lenses to have identical conical surfaces, thus resolving the contradiction between alignment precision and manufacturing ease.
Solution Approach 2:
The alignment function is segmented from the lenses and transferred to the lens holder. The lens holder contains the alignment features (protrusions and grooves) while the lenses focus on their optical function. This segmentation allows each component to be optimized independently, improving both alignment precision and manufacturing ease.
2Strength
If press-fitting method is used to attach lenses to lens barrel, then attachment strength is improved, but ease of assembly deteriorates due to difficulty in attaching lenses
Solution Approach 1:
The lens holder serves as an intermediary between the lenses and the lens barrel, providing a simplified attachment interface. The alignment features on the lens holder enable easy positioning and attachment of lenses without requiring complex press-fitting operations, thus improving ease of assembly while maintaining attachment strength.
Solution Approach 2:
The alignment features (protrusions fitting into grooves) enable self-alignment and self-positioning of lenses during assembly. This self-service mechanism guides the lenses into the correct position automatically, reducing the skill and effort required for assembly while maintaining secure attachment.
Data Source
AI summary
A lens module, including: a first lens including a first conical surface based on an optical axis and a first flat surface extending in a vertical direction with respect to the optical axis; and a second lens including a second conical surface based on an optical axis and a second flat surface extending in a vertical direction with respect to the optical axis, wherein the first conical surface and the first flat surface are connected by a first curved surface having a first radius, and the second conical surface and the second flat surface are connected by a second curved surface having a second radius.