Imaging Lens Module Stripe Structures Glue Overflow Control

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Solution Overview

Problem

The assembly of miniaturized imaging lens modules for portable electronic devices faces challenges in applying glue materials uniformly and efficiently, leading to issues with resolution and appearance due to partially overflowed glue, which complicates mass production and affects imaging quality.

Innovation Solution

The design incorporates a plastic barrel with parallel inner surfaces and regularly arranged stripe structures, where the glue material is applied between the outer annular surface of optical elements and these stripe structures, allowing controlled application and preventing overflow, thus ensuring uniform adhesion and improved manufacturing efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If glue materials are applied between the plastic barrel and optical elements to fix the location, then the optical elements are secured in position, but the narrow gap and shaping surface properties increase the difficulty of applying glue materials uniformly and cause appearance defects from glue overflow

Engineering Contradiction:

Improvefixing reliabilityVSAvoidglue application difficulty

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies local quality by creating stripe structures with different surface properties at specific locations on the inner tube surface. These stripe structures have increased surface area and enhanced adhesion properties precisely where glue application occurs, while other areas maintain their original properties. This localized modification enables uniform glue distribution and controlled overflow prevention without affecting the entire surface.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The stripe structures are pre-formed on the inner tube surface before glue application. This preliminary structuring of the surface creates predetermined zones that guide and control glue flow, ensuring uniform application and preventing overflow before the actual assembly process begins. The pre-configured surface topology facilitates easier and more reliable glue application.

Inventive Principle:

Principle #10Preliminary action

2Volume of moving object

If the gap between plastic barrel and optical elements is reduced for miniaturization, then the imaging lens module size is reduced, but the glue application becomes more difficult and less uniform

Engineering Contradiction:

Improveimaging lens module sizeVSAvoidglue application uniformity

Core Design Contradiction:

Volume of moving objectVSManufacturing precision

Solution Approach 1:

The stripe structures create localized zones with enhanced surface area and adhesion properties within the narrow gap. By concentrating surface modification only in the glue application regions rather than the entire inner surface, the patent maintains miniaturization while improving glue application uniformity through locally enhanced interaction between glue and surface.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The stripe structures transform the two-dimensional flat inner tube surface into a three-dimensional textured surface with increased effective area. This dimensional change allows the narrow gap to accommodate enhanced glue adhesion and uniform distribution without increasing the overall module size, as the surface complexity exists in the micro-scale dimension rather than macro-scale.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Strength

If more glue material is applied to ensure adequate adhesion, then bonding strength is improved, but appearance defects occur due to glue overflow

Engineering Contradiction:

Improvebonding strengthVSAvoidappearance defects

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The stripe structures concentrate adhesion enhancement in specific localized zones rather than distributing glue uniformly across the entire surface. This allows adequate bonding strength to be achieved in the critical attachment regions while the structured geometry naturally contains and directs excess glue away from visible areas, preventing appearance defects.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The stripe structures act as an intermediary between the glue material and the plastic barrel surface. They provide a textured intermediate layer that enhances glue adhesion and bonding strength while simultaneously serving as a containment structure that directs and limits glue flow, preventing overflow onto visible surfaces.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11480755B2Imaging lens module and electronic device

Publication Date: 2022.10.25 LARGAN PRECISION

AI summary

An imaging lens module includes a plastic barrel, an optical lens assembly and a glue material. The plastic barrel includes an outer object-end surface, an outer image-end surface and an inner tube surface. The inner tube surface connects the outer object-end surface and the outer image-end surface, and includes a plurality of parallel inner surfaces. A plurality of stripe structures are disposed on and protruded from at least one of the parallel inner surfaces, wherein the stripe structures are regularly arranged along a circumferential direction of the parallel inner surface. The optical lens assembly includes a plurality of optical elements disposed in the plastic barrel and arranged along the optical axis, wherein an outer annular surface of at least one of the optical elements is disposed correspondingly to the stripe structures. The glue material is applied among the outer annular surface and the stripe structures.