Rollo Assembly Winding Shaft Path Compensation
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Solution Overview
Problem
The shift in the path of the rollo screen wound off from the winding shaft causes varying distances with stationary components, leading to alignment issues and potential markings on the screen due to pressure from transverse guides.
Innovation Solution
The winding shaft is made movable perpendicular to its axis of rotation, maintaining a consistent path for the wound-off screen by compensating for position shifts with spring-loaded mechanisms and stationary pressure means, eliminating the need for separate guides and reducing marking risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a transverse guide is used to maintain the path of the wound-off rollo screen, then alignment consistency is improved, but markings appear on the rollo screen due to pressure from the guide
Solution Approach 1:
The patent removes the transverse guide component entirely and replaces it with a movable winding shaft mechanism. The winding shaft is positioned and moved such that the rollo screen unwinds along a consistent path without requiring a separate guide structure, thereby eliminating the source of pressure-induced markings while maintaining alignment consistency.
Solution Approach 2:
The winding shaft is made movable in the direction of the rollo screen's path rather than being fixed. This dynamic positioning allows the winding shaft to compensate for changes in screen thickness and maintain consistent unwinding geometry without requiring stationary guiding elements that would contact and mark the screen surface.
2Device complexity
If the winding shaft position is fixed, then the structure is simpler, but the path of the wound-off screen shifts causing alignment issues
Solution Approach 1:
The winding shaft is made movable in the direction of the rollo screen's path rather than being fixed. This dynamic positioning allows the winding shaft to compensate for changes in screen thickness and maintain consistent unwinding geometry without requiring stationary guiding elements that would contact and mark the screen surface.
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 maintains a constant distance between the wound-off screen and stationary components, preventing alignment issues and minimizing pressure-induced markings, ensuring consistent performance across varying screen lengths.
Implementation Method 1
The winding shaft is spring loaded towards said stationary pressure means
Data Source
Figure 1a~1d
Figure 2a~2d
Figure 3a~3d
AI summary
A rollo assembly is provided, comprising a winding shaft (1) defining an axis of rotation (2) and a flexible rollo screen (3) of which a first end is attached to the winding shaft, such that the rollo screen by an appropriate rotation of the winding shaft around its axis of rotation may be wound on or off the winding shaft. Part of the rollo screen wound off from the winding shaft extends along a certain path. The winding shaft is movable in a direction perpendicularly to its axis of rotation in such a manner that the part of the rollo screen wound off from the winding shaft always extends substantially along the same path independently from the amount of rollo screen wound off from the winding shaft.