Projector Lens Adjusting Module with Driven Member

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Solution Overview

Problem

The existing projector lens adjustment mechanisms can cause deformation of the shell structure due to interference between the projection lens and the stopping structure, leading to issues with picture quality and potential structural damage.

Innovation Solution

A lens adjusting module with a driven member connected to the projection lens and a limiting structure on the main body, where the rotating member is screwed to the driven member rather than directly to the lens, allowing force transmission to the screwing junction without excessive stress on the shell structure, thereby preventing deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the rotating member is directly screwed to the projection lens to adjust height, then the lens can be moved, but the shell structure deforms due to excessive force transmission

Engineering Contradiction:

Improvelens height adjustmentVSAvoidshell structure integrity

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The patent introduces a driven member as an intermediary component between the rotating member and the projection lens. The driven member has a limiting flange that contacts the limiting structure, acting as a mediator to transmit adjustment force while preventing excessive force from reaching the projection lens shell, thus avoiding deformation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The adjustment mechanism is segmented into distinct functional components: the rotating member for user operation, the driven member with limiting flange for force transmission and limitation, and the projection lens for imaging. This segmentation isolates the projection lens from direct force application, protecting its shell structure.

Inventive Principle:

Principle #1Segmentation

2Length of moving object

If the projection lens contacts the stopping structure directly during adjustment, then movement is limited, but the shell structure deforms due to interference

Engineering Contradiction:

Improvelens movement rangeVSAvoidshell structure shape

Core Design Contradiction:

Length of moving objectVSShape

Solution Approach 1:

The limiting flange of the driven member serves as an intermediary that contacts the limiting structure instead of the projection lens shell. This mediator absorbs the stopping force, preventing direct interference between the projection lens and limiting structure, thus maintaining the shell's original shape while still limiting movement range.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The force transmission and limiting functions are extracted from the projection lens itself and placed in the driven member and limiting structure. This extraction allows the projection lens to focus solely on its imaging function without bearing the mechanical stress of adjustment and limiting operations.

Inventive Principle:

Principle #2Taking out (Extraction)

3Strength

If high-strength materials are used for the shell structure to prevent deformation, then strength is improved, but manufacturing cost increases

Engineering Contradiction:

Improveshell structure strengthVSAvoidmanufacturing cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The driven member with limiting flange acts as a protective intermediary that shields the projection lens shell from excessive forces. This allows the use of standard, cost-effective materials for the shell structure rather than expensive high-strength materials, as the shell no longer needs to withstand extreme adjustment forces.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The driven member and limiting structure serve as sacrificial or replaceable components that absorb mechanical stress. By using these separate components instead of requiring the expensive projection lens shell to withstand all forces, the overall system cost is reduced while maintaining functionality.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 solution effectively prevents shell structure deformation and maintains picture quality without the need for expensive high-strength materials, reducing manufacturing costs by simplifying the design and avoiding excessive force transmission to the lens.

Implementation Method 1

The rotating member is screwed to the driven member and adapted to rotate to drive the driven member and the projection lens to move in the moving direction

Methodology Applied

Scientific EffectScrew: Screw

Data Source

PatentUS11249376B2Projector and lens adjusting module

Publication Date: 2022.02.15 CORETRONIC CORPORATION

AI summary

Provided are a projector and a lens adjusting module. The projector includes a main body, a light source disposed on the main body and providing an illumination beam, a light valve disposed on the main body and converting the illumination beam into an image beam, a projection lens movably disposed on the main body in a moving direction and projecting the image beam, and the lens adjusting module. The lens adjusting module includes a driven member connected to the projection lens and having a limiting flange, a limiting structure connected to the main body, and a rotating member screwed to the driven member and rotating to drive the driven member and the projection lens to move in a moving direction. The limiting structure is adapted to stop the limiting flange to limit a movement range of the driven member in the moving direction.