Screen Device Pulling Mechanism for Angled Operation Stability
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Solution Overview
Problem
Conventional screen devices experience operational instability and increased costs when used at angles, as they do not smoothly roll up or unroll due to gravity's influence and fail to maintain a neat flat position, leading to inefficient operation and aesthetic issues.
Innovation Solution
Incorporating a pulling mechanism with a spring element and additional protective casing to compensate for gravity's effect, allowing the screen to be positioned vertically or at an angle while maintaining smooth operation and a flat, windproof design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the screen device is used at an angle or in a lying state, then the screen can be positioned in different orientations, but the screen does not roll up and unroll smoothly and does not remain neatly flat
Solution Approach 1:
The patent introduces a pulling mechanism that provides a counteracting force to gravity when the screen is positioned at an angle or horizontally. This pulling mechanism compensates for the gravitational force that would otherwise cause the screen to sag or fail to roll smoothly, enabling reliable operation in various orientations without requiring a completely different design for each position.
2Adaptability or versatility
If a pulling mechanism is added to enable angled positioning, then the screen operates smoothly at angles, but the device complexity increases
Solution Approach 1:
The patent extracts the pulling mechanism as a separate, modular component with its own protective casing, rather than integrating it into the existing screen roller assembly. This separation allows the pulling mechanism to be designed independently for optimal performance while keeping the overall system manageable and maintainable.
Solution Approach 2:
The pulling mechanism is designed to provide multiple functions: it enables angled positioning, maintains screen tension for smooth rolling, and compensates for gravity in various orientations. This multi-functionality reduces the need for additional separate mechanisms, thereby limiting the increase in overall device complexity.
3Reliability
If an additional protective casing is added for the pulling mechanism, then the pulling mechanism is protected and integrated, but the aesthetic appearance may be adversely affected
Solution Approach 1:
The protective casing for the pulling mechanism is designed to nest within or alongside the existing frame structure of the screen device. This nesting approach allows the additional protective element to be integrated into the overall design without creating a bulky or visually disruptive appearance, maintaining aesthetics while providing necessary protection.
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
The solution ensures smooth rolling and unrolling, keeps the screen neatly flat, and provides a cost-effective, aesthetically superior windproof screen device that operates stably even when not vertically positioned.
Implementation Method 1
The pulling mechanism preferably comprises a spring element. Spring elements are reliable and inexpensive. A spring element can be concealed in a protective casing.
Implementation Method 2
The spring element preferably has in mounted state a bias so as to pull the screen when the screen is unrolled from the first protective casing.
Implementation Method 3
The spring element and the motor thus pull in opposite directions in order to tension the screen. The tension will cause the screen to extend in neatly flat manner.
Implementation Method 4
The screen roller is more preferably provided with a motor which is configured to pull the screen when the screen is being rolled up into the first protective casing.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Screen device comprising a screen roller and a screen which is rollable onto and unreliable from this screen roller and is attached with a first side edge to the screen roller, wherein the screen device comprises a frame with at least a first protective casing and two lateral guides, wherein the first protective casing is configured to receive the screen roller and wherein the lateral guides are configured to guide lateral side edges of the screen when the screen is rolled up and unrolled, characterized in that the screen device further comprises a pulling mechanism which is connected to a second side edge of the screen lying opposite the first side edge, wherein the frame further comprises a second protective casing for at least partially receiving the pulling mechanism.