Shading Device Roller With Segmented Longitudinal Seat

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Solution Overview

Problem

Existing sunblind rollers face issues with the bulk created by the folded-over hem of the canvas causing irregular winding, limited orientation reversal during assembly, and insufficient flexural strength, leading to potential deformation and operational complications.

Innovation Solution

The roller features a longitudinal seat with two separate main portions and an auxiliary portion, allowing the rod-like element and folded-over hem to be securely housed within the external profile, enhancing assembly flexibility and flexural strength through a symmetrical design and extended seamed joint.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the canvas is fastened to the roller with a conventional longitudinal seat, then the rod-like element can be retained, but the folded-over hem creates bulk causing irregular winding

Engineering Contradiction:

Improvewinding regularityVSAvoidbulk formation

Core Design Contradiction:

Stability of the object's compositionVSVolume of moving object

Solution Approach 1:

The longitudinal seat is divided into two separate main portions with a cusp between them. This segmentation allows the rod-like element to be retained securely while the folded-over hem is accommodated in the auxiliary portion without creating bulk that would interfere with regular winding.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The seat structure is designed with an auxiliary portion that provides an additional dimensional space for the folded-over hem. This dimensional accommodation eliminates the bulk formation problem by giving the hem a dedicated space within the external profile rather than allowing it to protrude.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the roller uses a conventional non-symmetrical seat design, then assembly is simple, but orientation reversal during assembly is limited

Engineering Contradiction:

Improveorientation reversal capabilityVSAvoidseat structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The seat structure incorporates symmetry elements (two main portions separated by a cusp) that enable orientation reversal capability. This symmetrical design allows the roller to be assembled in either orientation, providing versatility while maintaining structural integrity through the repeated cusp-and-portion pattern.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The longitudinal seat is designed to perform multiple functions: retaining the rod-like element in both main portions, accommodating the folded-over hem in the auxiliary portion, and enabling orientation reversal during assembly. This multi-functionality achieves versatility without proportionally increasing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Strength

If the roller has insufficient flexural strength, then manufacturing is easier, but deformation and operational complications occur

Engineering Contradiction:

Improveflexural strengthVSAvoidmanufacturing complexity

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The seamed joint is extended beyond the basic requirement to provide preliminary reinforcement against flexural deformation. This extended joint acts as a preemptive strengthening measure that prevents operational complications before they occur, while the manufacturing process remains straightforward.

Inventive Principle:

Principle #10Preliminary action

4Stability of the object's composition

If the longitudinal seat has a narrow slit width, then the rod-like element is securely retained, but the folded-over hem cannot be accommodated

Engineering Contradiction:

Improverod-like element retentionVSAvoidhem accommodation capability

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The longitudinal seat is segmented into two main portions separated by a cusp, with each portion capable of independently retaining the rod-like element. This segmentation allows the slit width to remain narrow for secure retention while the auxiliary portion provides separate accommodation space for the folded-over hem.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The auxiliary portion acts as an intermediary structure that receives the folded-over hem without interfering with the retention function of the two main portions. This intermediary element mediates between the conflicting requirements of narrow slit width for retention and hem accommodation space.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP3061888B1Winding roller for a shading device or an awning

Publication Date: 2017.04.19 F I TE SOL SRL

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AI summary

The invention relates to a roller 40 for the sunblind 20. The roller is designed to be fastened to a canvas 26 of the blind and defines an axis of rotation X. A cross-section of the roller perpendicular to the axis X : - defines an external profile P suitable for allowing winding-up of the canvas; and - comprises a longitudinal seat 42 formed inside the external profile P . The longitudinal seat: - communicates with the exterior via a longitudinal slit 44 defined by two edges 440; - comprises two separate main portions 420, inside each of which a cylinder of diameter d may be inscribed; and - comprises an auxiliary portion 422 between the two main portions. Furthermore the two separate main portions are separated by a cusp 424 and the distance w between the cusp and each edge of the longitudinal slit is smaller than the diameter d . The invention also relates to a sunblind 20 comprising such a roller 40.