Camera Module Focal Length Adjustment Mechanism

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Solution Overview

Problem

Manufacturing camera modules is time-consuming due to the difficulty in accurately setting the focal length between the lens barrel and the lens holder, requiring repeated disassembly and adjustment processes.

Innovation Solution

A camera module design that includes a lens barrel, a lens holder with a focal length adjusting unit, allowing for adjustable focal length without disassembly, utilizing a rotatable focal length adjusting unit with step difference surfaces to align with the body part, enabling precise adjustment of the focal length between the lens and the sensor unit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the focal length is set after assembling the lens barrel and lens holder, then the manufacturing precision of the focal length can be verified, but the manufacturing time increases due to repeated disassembly and adjustment

Engineering Contradiction:

Improvefocal length accuracyVSAvoidmanufacturing time

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The lens holder is pre-assembled with the lens barrel and the focal length is preliminarily set during assembly. This preliminary action allows the focal length to be verified after assembly without requiring complete disassembly for adjustment, thus reducing manufacturing time while maintaining accuracy verification capability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The lens holder is designed with an adjustable structure that allows focal length modification after assembly. The adjustable lens holder can be repositioned relative to the lens barrel to fine-tune the focal length without complete disassembly, enabling dynamic adjustment while maintaining assembly integrity

Inventive Principle:

Principle #15Dynamics

2Productivity

If the focal length is set during assembly, then the manufacturing time is reduced, but the manufacturing precision may be compromised due to assembly tolerances

Engineering Contradiction:

Improvemanufacturing timeVSAvoidfocal length accuracy

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The lens holder is divided into multiple adjustable segments or positioning features that can be independently adjusted. This segmentation allows precise focal length setting by adjusting individual segments rather than requiring complete disassembly, maintaining both speed and precision

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

An intermediary adjustment mechanism is introduced between the lens barrel and lens holder assembly. This intermediary component facilitates precise focal length adjustment without requiring disassembly of the main assembly, acting as a mediator that enables fine-tuning while maintaining overall assembly integrity

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9063272B2Camera module for easy adjustment of the focal length

Publication Date: 2015.06.23 LG INNOTEK CO LTD

AI summary

Disclosed is a camera module. The camera module includes a lens barrel including a lens, a lens holder coupled with the lens barrel, and a sensor unit in the lens holder. The lens holder includes a body part including the sensor unit, and a focal length adjusting unit interposed between the lens barrel and the body part to adjust a focal length between the lens and the sensor unit. The focal length of the camera module is easily adjusted without disassembling the camera module.