Screening Guide Bar Inversion for Light Protection

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Solution Overview

Problem

Traditional screening arrangements face issues with wear and tear due to diameter variation of the screening body when unrolled, and exposure to light, particularly sunlight, which can deteriorate the screening body, especially in space-constrained structures like roof windows.

Innovation Solution

The screening body's front side faces inward when stored, with a guide bar and roller bar configuration that minimizes light exposure and optimizes space usage, featuring a top rail connected to a cover, a compact design with integrated roller shaft and end pieces, and tapering guide bar for tension control, reducing material consumption and aesthetic appeal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the screening body is stored on the roller bar with the front side facing outwards, then the screening body is easily accessible and visible, but the front side is exposed to light which causes deterioration

Engineering Contradiction:

Improvestorage configurationVSAvoidlight exposure causing deterioration

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent inverts the conventional storage orientation by positioning the front side of the screening body to face inwards toward the room rather than outwards. This inversion protects the front side from light exposure while maintaining aesthetic appearance when deployed, as the front side remains visible during use but protected during storage.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If side rails are provided to guide the screening body, then wear and tear on the screening body is reduced, but the device complexity increases

Engineering Contradiction:

Improvewear resistanceVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the guidance function from separate side rails and integrates it into the guide bar system. The guide bar, positioned parallel to the roller bar, provides the necessary guidance and alignment for the screening body without requiring additional side rail structures, thereby reducing overall device complexity while maintaining wear resistance.

Inventive Principle:

Principle #2Taking out (Extraction)

3Volume of moving object

If the roller bar diameter varies with screening body unrolling, then the screening body can be stored compactly, but the screening plane angle varies causing positioning errors

Engineering Contradiction:

Improvestorage compactnessVSAvoidscreening plane positioning accuracy

Core Design Contradiction:

Volume of moving objectVSManufacturing precision

Solution Approach 1:

The patent introduces the guide bar as an intermediary element between the roller bar and the screening body. The guide bar, with its fixed diameter and parallel positioning, serves as a reference that compensates for the varying diameter of the roller bar during unrolling, ensuring the screening body maintains the correct screening plane angle regardless of storage compactness.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP2150670B1A screening arrangement including a guide bar

Publication Date: 2014.07.09 VKR HOLDING AS

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AI summary

The screening arrangement comprises a top element (4), a bottom element (7), and a screening body (6). The top element includes a roller bar (460) and a guide bar (470) for guiding the screening body (6) into a screening plane. The screening body (6) is wound in mutually opposite directions on the roller bar (460) and the guide bar (470), and the front side of the screening body faces inwards on the roller bar in the non-screening position.