Optical Lens Fixing Structure with Interlocking Barrel and Element

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Solution Overview

Problem

Conventional optical lenses are prone to angle shifts and image quality degradation due to displacement caused by external forces, as they rely solely on adhesive retention for stability.

Innovation Solution

An optical imaging lens with a fixing structure featuring a barrel and optical elements with blocking and stopping portions that interlock along the axis, providing enhanced stability and eliminating the need for adhesive curing during assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If adhesive retention method is used to fix optical lenses, then assembly process is simple, but stability against external forces is poor causing lens displacement and angle shift

Engineering Contradiction:
Improveassembly process simplicityVSAvoidstability against external forces
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The fixing structure is segmented into multiple functional portions: a blocking portion that prevents lateral movement, a stopping portion that prevents axial movement, and a retaining portion that provides additional mechanical retention. This segmentation allows each portion to address specific displacement directions independently, significantly improving reliability against external forces while maintaining assembly simplicity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The fixing structure acts as an intermediary mechanical element between the optical lens and the barrel. Instead of relying solely on adhesive bonding, this intermediate structure provides direct mechanical support and constraint, transferring and distributing external forces away from the adhesive joint, thereby preventing lens displacement and angle shift.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Productivity

If adhesive curing method is used for mounting, then initial assembly is quick, but curing time is required and stability under impact is insufficient

Engineering Contradiction:
Improveassembly speedVSAvoidstability under impact
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The fixing structure is pre-installed in the barrel before the optical lens is mounted. This preliminary action creates a ready-made mechanical constraint system that immediately prevents displacement upon lens installation, eliminating the need to wait for adhesive curing while ensuring stability under impact from the outset.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent replaces the chemical bonding mechanism (adhesive curing) with a mechanical constraint system consisting of blocking, stopping, and retaining portions. This substitution eliminates the curing time requirement entirely, as the mechanical structure provides immediate retention, while simultaneously improving stability under impact through direct force distribution.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS9989725B2Optical imaging lens with a fixing structure
Publication Date: 2018.06.05 GENIUS ELECTRONICS OPTICAL XIAMEN
  • US9989725B2 patent drawing
  • US9989725B2 patent drawing
  • US9989725B2 patent drawing

AI summary

A lens includes a barrel and a first optical element. The barrel includes an inner circumferential surface surrounding an axis and defining an accommodation space, an object side and an image side spaced at two ends of the axis and interconnecting with the accommodation space, and a first mounting portion integrally formed around the inner circumferential surface. The first mounting portion includes a first blocking portion having a first blocking surface corresponding to the object side. The first optical element is received in the accommodation space, and disposed in the first mounting portion, and includes a first body portion and a first stopping portion. The first stopping portion includes a first stopping surface leaning against the first blocking surface. The distance between an outermost edge of the first stopping portion and the axis is greater than the distance between an innermost edge of the first blocking portion and the axis.