Lens Module Annular Structure for Single-Step Filter Fixing
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Solution Overview
Problem
The existing lens module assembly process involves two adhesive dispensing steps, which results in poor assembly efficiency due to the use of ultraviolet curing glue on the optical filter, leading to inefficiencies.
Innovation Solution
A lens module design featuring an annular structure with alternating step and bevel portions on the inner annular surface, allowing adhesive to flow down and cure between the optical filter and the last optical lens, fixing them simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UV glue is arranged on the periphery of the last optical lens and then on the periphery of the step provided with the optical filter, then the optical filter can be fixed, but two adhesive dispensing steps are formed resulting in poor assembly efficiency
Solution Approach 1:
The patent merges two separate adhesive dispensing steps into a single step by designing the annular structure with step portions and bevel portions that allow one adhesive application to simultaneously secure both the optical lens assembly and the optical filter. The adhesive is dispensed once and flows down from the bevel portions to the annular trench, fixing both components in one operation.
Solution Approach 2:
The annular structure is segmented into multiple functional portions including step portions, bevel portions, and an annular trench. This segmentation allows the adhesive to be strategically positioned and flow to different locations, enabling single-step fixation of multiple components while maintaining reliable bonding at each interface.
2Manufacturing precision
If two adhesive dispensing steps are used to fix the optical filter, then proper positioning is achieved, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The annular structure is divided into step portions, bevel portions, and an annular trench, each serving a specific function in the adhesive dispensing process. This segmentation enables precise positioning of the optical filter while simplifying the overall process by requiring only one adhesive application step.
Solution Approach 2:
The annular structure with its pre-designed step portions, bevel portions, and annular trench is prepared in advance. This preliminary configuration ensures that when adhesive is dispensed, it automatically flows to the correct positions and quantities, eliminating the need for multiple dispensing steps and complex positioning procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design improves adhesive dispensing efficiency by allowing the adhesive to be dispensed once, enhancing the assembly efficiency of the lens module.
Implementation Method 1
the adhesive may flow down from the bevel portions and the grooves to the annular trench between the last optical lens of the optical lens assembly and the lens barrel
Implementation Method 2
the UV glues for the first and second times are irradiated by UV for curing
Data Source
AI summary
A lens module includes: a lens barrel including a annular structure, an inner annular surface surrounding the central axis and an outer annular surface opposite to and surrounding the inner annular surface, wherein the inner annular surface forms an accommodating space; an optical lens assembly and an optical filter sequentially disposed in the accommodating space from the object side to the image side; wherein the annular structure is disposed on the inner annular surface and surrounds the central axis, the annular structure includes at least two step portions and at least two bevel portions, all the step portions and the bevel portions are close to the image side, and the optical filter is disposed on the step portions; and the step portions and the bevel portions are alternately disposed along a annular path of the inner annular surface.