Camera Module Rotation Prevention Lug Groove Mechanism

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Solution Overview

Problem

Compact camera modules experience de-focusing and device damage due to rotational movement during hand-shake correction, as conventional tilting mechanisms fail to prevent rotation and cause contact issues.

Innovation Solution

A camera module design featuring a lug and groove system that prevents horizontal rotation while allowing tilting movements, ensuring the module part can tilt in two dimensions without rotating, thus preventing de-focusing and device damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a tilting mechanism is used for hand-shake correction, then image quality is improved by compensating for hand-shake, but rotational movement occurs causing de-focusing

Engineering Contradiction:

Improveimage qualityVSAvoidfocus accuracy

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The movement correction function is divided into two independent mechanisms: tilting movement for hand-shake correction and rotational movement prevention for focus maintenance. The module part is segmented to allow tilting while constraining rotation through the groove structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The groove structure acts as an intermediary element between the module part and the case. It mediates the movement by allowing tilting motion while blocking rotational motion, thus enabling hand-shake correction without de-focusing.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the module part is allowed to tilt for hand-shake correction, then hand-shake is compensated, but rotational movement causes contact and damage to the module part

Engineering Contradiction:

Improvehand-shake correctionVSAvoidcontact damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The groove structure is designed in advance to prevent rotational movement before contact damage can occur. By providing a predetermined groove path, the system proactively constrains the module part to avoid harmful contact with the case during hand-shake correction.

Inventive Principle:

Principle #9Preliminary anti-action

3Manufacturing precision

If rotation is prevented using a lug and groove system, then de-focusing is prevented, but device complexity increases

Engineering Contradiction:

Improvefocus accuracyVSAvoidstructure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

Instead of constraining the entire module part uniformly, only the specific lug portion is engaged with the groove structure. This localized constraint approach prevents rotation while maintaining simplicity, as only a small portion of the module part requires the additional lug feature.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS9253381B2Camera module having rotation prevention means

Publication Date: 2016.02.02 LG INNOTEK CO LTD

AI summary

The present invention relates to a camera module configured to prevent de-focusing during correction of hand-shake, and to prevent damages to devices during correction of hand-shake, the module including: a module part including a lens assembly formed with at least one or more lenses, an image sensor having an image pickup device for converting light concentrated through the lens to an electrical signal, and a PCB (Printed Circuit Board) mounted with the image sensor; a case supporting the module part by accommodating the module part; a driving part tilting the module part; and a rotation preventing part preventing the module part from rotating on a vertical axis.