Projection Screen Motor Segmentation and Cable Lowering

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing projection screen systems often have limitations in positioning the screen directly from the housing, making it difficult to provide the screen at a distance below the housing, which restricts flexibility and usability.

Innovation Solution

A support system comprising a roller, a housing, a motor external to the roller, and an engagement member that can move between torque transmission and disengagement positions, allowing the screen to be rolled and unrolled, and the housing to be lowered or raised using a cable system, enabling the screen to be positioned at various configurations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If the motor is positioned internal to the roller, then the structure is compact and simple, but the screen cannot be lowered below the housing to a distance greater than the housing height

Engineering Contradiction:

Improvescreen positioning distanceVSAvoidsystem structure

Core Design Contradiction:

Length of moving objectVSDevice complexity

Solution Approach 1:

The system divides the motor positioning into two separate locations: a first motor positioned within the housing that operates when the screen is above the housing, and a second motor positioned external to the housing that operates when the screen is below the housing. This segmentation allows the screen to be positioned at distances greater than the housing height while managing system complexity through distributed motor placement.

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If the engagement member continuously transmits torque to the roller, then the screen can be precisely controlled, but the roller cannot be independently lowered using the cable system

Engineering Contradiction:

Improveroller independent movementVSAvoidtorque transmission control

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The engagement member is designed to dynamically change its state between engaged and disengaged positions. When engaged, it transmits torque from the first motor to the roller for precise control. When disengaged, it allows the roller to be independently lowered using the cable system with the second motor. This dynamic switching enables both precise torque transmission control and independent roller movement.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the motor is positioned external to the housing, then the screen can be lowered below the housing, but the system requires additional components and complexity

Engineering Contradiction:

Improvescreen positioning flexibilityVSAvoidsystem components

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The second motor positioned external to the housing serves multiple functions: it winds and unwinds the cable to lower and raise the roller and screen assembly, and it enables the screen to be positioned at various distances below the housing. This multi-functionality increases adaptability and versatility while managing the added complexity through a single external motor handling multiple operations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 allows for flexible positioning of the projection screen, enabling it to be fully unrolled and lowered below the housing, enhancing usability and flexibility in setup configurations.

Implementation Method 1

a cable system including a cable roller and at least one cable coupled to the cable roller and the housing, the housing and the roller being suspendable from the at least one cable

Methodology Applied

Scientific EffectGravity: Gravitation