Lens Module Multi-Matching Structure Assembly Stability
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Solution Overview
Problem
Current lens structures face challenges in assembly stability due to the precision issues of glass lenses and the instability of matching between lenses, which affects the overall imaging quality.
Innovation Solution
A novel lens module design featuring a multi-matching structure between the lens barrel and lenses, including a symmetrical shape with specific matching surfaces and light-shading sheets to enhance alignment and stability, using a combination of glass and plastic lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If glass lenses are used in the lens module, then imaging quality is improved, but assembly stability deteriorates due to outer diameter precision problems
Solution Approach 1:
A positioning ring is introduced as an intermediary component between the glass lens and the lens barrel. The positioning ring has an inner diameter that fits the outer diameter of the glass lens and an outer diameter that fits the inner diameter of the lens barrel, serving as a mediator to transfer and stabilize the positioning function. This resolves the contradiction by allowing glass lenses to maintain their imaging quality while the positioning ring compensates for precision variations in glass lens manufacturing.
Solution Approach 2:
The positioning ring creates a standardized interface that copies the positioning function across different glass lenses. Instead of relying on the precise outer diameter of each individual glass lens, the positioning ring provides a consistent positioning geometry that can accommodate variations in glass lens dimensions while maintaining assembly stability.
2Reliability
If matching structures are added to improve assembly stability, then assembly stability is improved, but device complexity increases
Solution Approach 1:
The matching structure is segmented into two functional parts: the positioning ring and the light-shading sheet. The positioning ring handles the mechanical positioning and stabilization function, while the light-shading sheet handles the optical function of preventing stray light. This segmentation allows each component to be optimized for its specific function without adding unnecessary complexity to the overall structure.
Solution Approach 2:
The positioning ring serves multiple functions simultaneously: it provides mechanical positioning, structural support, and a mounting interface for the light-shading sheet. By making the positioning ring multi-functional, the design avoids adding separate components for each function, thereby improving assembly stability without proportionally increasing device complexity.
3Manufacturing precision
If light-shading sheets are added to prevent stray light, then imaging quality is improved, but device complexity increases
Solution Approach 1:
The light-shading sheet is merged with the positioning ring by being disposed on the outer surface of the positioning ring. This combination allows the light-shading function to be integrated into an existing structural component rather than adding a completely separate element. The light-shading sheet becomes part of the positioning ring assembly, reducing overall device complexity while still providing the necessary stray light prevention to improve imaging quality.
Data Source
AI summary
A lens module includes a lens barrel and a lens group having a first second lenses. An image side surface of a first barrel wall includes a first planar surface, a first oblique surface extending towards the optical axis and towards the image side, and a second planar surface. An object side surface of a peripheral portion of the first lens includes a third planar surface attached to the first planar surface and a second oblique surface attached to the first oblique surface. An image side surface of the peripheral portion of the first lens includes a fifth planar surface, a third oblique surface extending towards the optical axis and towards the image side, and a sixth planar surface. An object side surface of the second lens includes a seventh planar surface attached to the fifth planar surface and a fourth oblique surface paced apart from the third oblique surface.